I bought a pikachu 3ds when it came out in anticipation for XY. I have only been able to use the 3D for a couple games and for the street pass, but I think it's awesome! I can't imagine EVER buying a 2DS.
I will probably end up getting the 2DS. Even though it'd be great to get a Pokemon 3DSXL for $200, the 2DS at $130 is just so much cheaper, and I can buy a Pokemon decal on the internet for it.