Well we could all sit here and debate features all week, but what it comes down to in the end is; which system has the games you want to play? I don't care much about the nitty gritty spec details, the reason why I bought Sony systems instead of Nintendo is because Sony had the majority of the RPGs (my favorite genre).

So I think the deciding factor for most people will be which games will come out for the PSP and DS when they come out.