PS3 Backwards Compatibility?

Go for the 60. The 60 has a seperate chip "emotion chip" that makes the system fully compatitable with every PS2 title. With the 80gb model it uses software to emulate the ps2 title that you would play. Emulation does the job but it can be a little buggy at times from what I notice with my friends PS3. I don't have the same issues with my PS3 (60gb). Also not every older title is supported on the 80 model. My system is even since I replaced the orginal 60gb harddrive with a 250gb one.