I would definitely go with 2c-i... It's a much gentler compound, but still very psychedelic and if its your first trip altogether you will be more then blown away by 15 or 20 mg of 2c-i.. Honestly I find 2c-i and 2c-e about as different as you can get in the 2c-x's. 2c-i is kind of a candy psych, meaning theirs a bunch of euphoria, positive energy push and stimulation, interesting visuals, mental space not to altered but still in a very psychedelic mind set, nausea pretty non-existent on lower doses. Just a nice solid comfortable
recreational trip. A very good starter compound.
2c-e is a lot more of a serious psychedelic (not that 2c-i cant be) that is overall pretty neutral and often overwhelming to those not experienced with psychs. Not to much in the way of euphoria (for me) until marijuana is added into the mix. A
lso the nausea is overwhelming for me, im pretty much straight poisoned for the first two hours of the eperience. Stimulation can be pretty strong but the push is completely neutral. The visuals are among the strongest I've ever seen from a PEA, and the mental space is one of the most unique i've ever experienced from any psych, very conductive to serious introspective work. A lot of people (myself included) do not consider 2c-e to be a recreational experience, or even fun for that matter. Its a great chemical but not to be taken lightly.
So to me, and this varies so much from person to person its not even funny, 2c-i would be the ideal starting chem, save the 2c-e until your comfortable with tripping.