Well... neither of the games are out yet. Save for someone that's maybe played one of these games at E3 or something, no one here knows anymore about the game than you might(provided you've kept yourself up to date with some of the videos/previews etc). Not really my place to tell you what to do either, but I think maybe you should research each system instead of putting all your chips on one because of a single game and forum survey. Of course, if you have enough to afford a PSPGo you could probably just buy a cheap PSP and DS and still have enough left for both games.