Well you gotta look at it this way, the 3DS Has NO GOOD GAMES OUT right now, and the system is bound to get a refresh (battery issues, different colors etc.) or even a price drop, so you could just wait and around the time the PSV comes out there should be a good lineup out for the 3DS, so around then it will make your choice easier.
I got a 3DS After winning $500 on a slot machine and I am kinda sorry I bought it, the only game I play for it would be Zelda OoT3D, but I played the hell out of this game from n64 to gamecube.
If you wait you have a good chance of a Price drop and a Refresh of the system around that time (3DS Lite?) and ALOT more games out for it...
Honestly, I am gonna sell my 3DS and save my money for the Vita.
My Honest Opinion.