The fact is, if I was to buy either of them, it'd be a PSP.

I already have a memory stick, so the advanced pack is no use to me. I can use the memory stick between my cell phone and this, great! Plus, I really have no interest in all the games in DS. The stats on the PSP is pretty much equivilent(sp?) to the PS2. Allowing it to play the PS2 games that already look so much kick ass. I really can't ask for anything else! PSP!