Cmon! One mention of RB2, and it's a maybe??!?! It's a great game on 360, why wouldn't it be on PS3? I am DEFINATELY picking up it, and either Bioshock or Resistance 2. Maybe something else too, like Far Cry 2. I like to have some money, and these two months are wallet drainers.
I've had both, and I personally like the PSTwo better because it's a lot less costly to play back up games if you can do it (You know what I mean), and the flip top is better built than the disk tray, which eventually starts sticking to the system and not opening.