Check out Bluetech!!!! Can't believe he wasn't mentioned. he makes great psychill. most any song by him is gonna be good. Zero Cult also makes a similar genre.
*****
Just to throw in a quick note on top, if any of you are subscribers on last.fm, I have a variety of playlists to choose from.. i believe there's 4 or 5 total. A couple different ones for different moods. The newer ones mix a little trance in with everything, the others are mostly psychill/psybient.
http://www.last.fm/user/Limesmoke/playlists
Feel free to rob my profile from that link too, just delete the /playlists.*****
Check out the album 1 Freedom by Isaak Hypnotizer. Listen to Every Moment is Magical and 1 Freedom (the song). They're my fav.
My three fav Zero Cult (saw he was mentioned earlier) songs are Broken Hope (for the intro and climax), P-ray (cydelix remix) <--
http://www.youtube.com/watch?v=Z7L1Mqy9y0Y and Till The Morning.
I'm a pretty big fan of a few songs from Younger Brother. (One of the members of Shpongle (Simon Posford) with Benji vaughn from Prometheus. The duo makes a very unique sound.
http://www.youtube.com/watch?v=jxyJ3OHdEYk
Younger Brother - Ribbon on a Branch (I annotated all the lyrics in, better appreciate it! it was time consuming as fuck!)
If you like that YB song, check out Psychic Gibbon by them as well.
Also, Check out Electrypnose's album, Le tireur de ficelles. one of my favourite songs from it is:
http://www.youtube.com/watch?v=IOo1VF_PAvI
Other commendable artists (not well known, but worth it a few times over):
Magic Sound Fabric
Erothyme not famous but BURSTING with talent, and its only a matter of time before he's big. Good friend of mine. Makes a lovely cross between psychill and IDM. PsyDM is what we call it. He offers two
FREE 11 and 6 song HQ mp3 album. download at http://erothyme.bandcamp.com (Coincidentia Oppositorium, and his EP Virginian Winter) All of my friends who have been shown is tracks have really enjoyed his unique style, and lively rhythms. Help get my buddy Erothyme discovered, and get his potential a little better known.
Asura. WATCH-->
Dust and Daffodils, http://www.youtube.com/watch?v=BeZuRqnWmyY They Will Come, Longing For Silence, La Chanson De Carla (link below).
Kuba (most is really gooodd, one of my pers. favs is Shining Rage)
Kick Bong (really chilled out downtempo grooves, Favs: Something Better, Way of Life and Gravity)
james murray has a lot of really good works. More of a psybient artist, compared to the others here
Side Liner
Aes Dana
I Awake
Hol Baumann
Harax (The songs, 'Nearlysun' and 'Night' are captivating...)
Phutureprimitive
Cell May I recommend: Explicit Rotative Movement, Audio Deepest Night, Sensitiv' Garden, X-Press Morning, Under Your Mind, Soon, Flexible World, The Gate, Floating Retention, and Father.
Easily Embarassed
Dymons
Shulman
Androcell
Tripswitch
Access to Arasaka (A really chill glitch IDM band i've discovered.)
*****You've mentioned solar fields....
Solar Fields is a big one for me. They are my top artist on last.fm apparently.
Feelings (Album Edit) is one of my favs. If you have not heard it, this should change (; And for the more ambient side of solar fields...
Insum, or Insum (Remix) OR BOTH :D
and if you like that song, check out Leaving Home.
A must check out for any solar fields fan is Times Are Good (Sometimes Remix)
http://www.youtube.com/watch?v=Qray6y6WfjU. ******
Black Arrow and Kick Back go hand in hand together as a higher tempo, definitely unique (less ambient) style of solar fields than we know.
Listen to 'Summer" too by them. VERY unique. mmmmmmmTheir Earthshine album is really something else. In a good way, of course. The Road to Nothingness, Shard, and Levitate are also recommendable songs.
BUT FFS. Assure you have bass, and ample volume.
**
LISTEN TO EPICENTRE - FIRST AND SECOND MOVEMENT by CBL
http://www.youtube.com/watch?v=fd0Ceq8PTQc
This video gets the best of both songs in one and is trully mesmerizing

**
Small sampler of random awesome songs with cool videos:
http://www.youtube.com/watch?v=Rc2DfzshZag
Access to Arasaka - 5mc04
http://www.youtube.com/watch?v=Cn8zZpOkwZU
Asura - La Chanson De Carla
http://www.youtube.com/watch?v=bnBpK8vpLGQ
Erothyme - Saboteur, Don't Drag Me Down
(HIGHLY RECOMMEND)
http://www.youtube.com/watch?v=MlrF2RVVyFQ
Shulman - Transmission in Bloom
(mmmmmmmm. love love love)
http://www.youtube.com/watch?v=uL_JSDmyHt0
Erothyme - Directly Perfectly
http://www.youtube.com/watch?v=5OcfK9sOtUE
Anahata - moments
http://www.youtube.com/watch?v=QRXf88R97No
Chilled C'quence (
great artist btw) - In a Row
These next two are interesting.....
http://www.youtube.com/watch?v=YpEBiw1UFJ0
Etnica - Elektrodub
http://www.youtube.com/watch?v=aK6Bv-hMiB4
Phobosphere - Intersection 2060
and last.... but certainly not least. An interesting CBL song, with pretty much spoken female vocal samples. I have the lyrics for the song, and the video here.
http://www.youtube.com/watch?v=BQJ1o0QRdYM
Carbon Based Lifeforms - Erratic Patterns
People who listen to AND TRULY APPRECIATE good quality ambient, psy, chillout, downtempo, IDM etc are rare to find nowadays. If you've got similar taste in tunes as I, and/or hobbies, feel free to give me an add on msn

Im on a decent amt. and bored, like i am right now, writing this giant post about music I like.
(and, if you aren't in the USA, this video prolly isnt blocked.... They blocked it here... sooo fucking gay... but this is a reaaallly good song. if you dont find it through my URL, you can find it on related videos or w/e.
http://www.youtube.com/watch?v=f-NkzK2m6iQ
Pitch Black - Ape to Angel
(oh yeah forgot to mention Pitch Black. Some, not all of his tracks are good. But thats the case with a couple of the artists I've listed too. It takes a selective ear to choose a selected style.)
Also, IIRC, a great way to load up on music is to go on isohunt and search for the dvd1-7 torrents (download as many or few as you want, its all albums of similar artists. Dvd4 and 5 were my favourite. dvd6 is most diverse.