One thing I forgot to add, you mentioned that you didn't want the music to be messed up like on Ket.
Music on 2C-E is pure utter bliss. One thing I found though is that with oral dosing yeah the first 2-3 hours are quite stimulating, so if you want it to be more laid back/mellow I'd recommend nasal, be aware that nasal comes on a lot quicker and is much more intense - some people also find it very nauseating, personally I have no nausea from 2C-E but to add to the YMMVs in this thread - YMMV haha.
I find though with nasal that because it hits so hard you don't get the stimulating part at all really, you get hit so hard that you want to lay down straight away, and by the way, laying down on 2C-E feels amazing.
I'd like to try 2C-C and see how they compare because I already find 2C-E quite chilled. One thing I almost didn't mention though, 2C-E depends a LOT on the music, seriously, it's like a completely different drug depending on what music I have on, so if you want it to be more chilled - listen to that kind of music, and if you want it to be more stimulating and euphoric - put on some rave tunes!