The PSP has the media playing and emulation abilities (not that I emulate...and not that I have a PSP) but the DS just has so many more games that are good. All the PSP has for games, essentially, is Lumines, GTA, MG Ac!d, Daxter and Madden 2006. The DS has Mario Kart, Trace Memory, Metroid Prime Pinball, Mario 64 DS, Castlevania, Phoenix Wright, Meteos, and more. As for upcoming games, you can't honestly ignore the Animal Crossing, Guilty Gear, Metroid Prime, Viewtiful Joe, Resident Evil, Feel the Magic 2, Final Fantasy 3, Xenosaga and the new Super Mario And of course, the $120 extra on the PSP and the extra $10-25 on each game.