I also have both and do not regret it at all. I love the re-makes for the DS (III, IV, and also the GBA versions of the re-makes you can play), but then again, I love Crisis Core (Easily one of my favorite games on any system) and the re-make of Final Fantasy Tactics. I believe that the PSP will have more hardcore games coming to it, the simple fact that it has a little more horsepower than the DS, but the DS really does have a good lineup coming to it too. So, my advice is to check out what games are coming out for it or are already out and make your decision based off of that.