If it's the ps2 games that interest you, get a ps2.
All ps3s are compatible with ps1 games. However, the only ones compatible with ps2 games are: The launch 20gb/60gb(NA/EU) and the MGS4 80gb ps3. You can find lots of information about ps3 SKUs on wikipedia
http://en.wikipedia.org/wiki/PS3
"Dr. Tenma, according to you, lives are equal. That's why I live today. But you must have realised it by now...the only thing people are equal in is death"---Johann Liebert (MONSTER)
"WAR is a racket. It always has been.
It is possibly the oldest, easily the most profitable, surely the most vicious. It is the only one international in scope. It is the only one in which the profits are reckoned in dollars and the losses in lives"---Maj. Gen. Smedley Butler







