Honestly? I think I'd rather have the PSP version, if only for the difference in graphics during the cutscenes. I... I have a thing for PS cutscenes. :x Also, the DS version doesn't come with The After Years, and if I'm throwing down as much cash as they want for their games, I'd rather have two for the price of one.
Well, unless they end up splitting the games up, like they did with I and II when they debuted on the PSP. If that's the case, I'll just wait until The After Years goes on sale.
... God, the Magus Sisters look amazing on the new release.