DS. It's my next system after the PSP Go as well.
XBox is a surprisingly similar to what you have with the PS3. Unless Halo, Gears, Mass Effect, Fable and a few others interest you greatly and you really wanna have the easiest to use friend and chat features(at a premium price). I don't see the point. It would be rather redundant.
Wii is just like the DS except the library sucks cause it hasn't had enough time to mature. It's a great experiment but purchase one much later once it has tons of interesting games.
DS = the Wii but with way better 3rd party support and an already massive library. Even though I'm not interested in any 1st party titles there are still tons of gems and interesting quirky titles to consume.







