Posted Wed Feb 6, 2013 5:23 PM
MAME on the PS2 is so unbearably slow, it's not even funny. Only a handful of games run at full speed, and by handful, I mean less than a dozen. Even then, the only ones that ran decent were the vertical oriented games from the early 80's. Believe me, I tried, as I too was excited over the the idea of using my PS2 as a powerful emulation machine.
Bottom line is, you're better off getting some of the arcade compilations (Namco, Capcom, SNK...) if you're set on using the PS2 exclusively. If not, the xbox as mentioned above is probably you're safest bet.