If you have a long commute or a ton of free time at a job or something where you will want to watch movies, then get a PSP. I would say DS if you are more interested in just playing games, since there are more quality games out for it than for PSP, and they are cheaper. For the price of a PSP, you could get a DS and probably any 3 games of your choice for it, not to mention that it can play GBA games too, which was a big selling point for me since I never had a GBA. PSP is still a good system, but I think $50 for a new game (of which GTA is the only one I want right now) is too much for something you can only play on a small, yet nice, screen.