Hello everyone,
I heard that the 40, 60 and 160 GB PS3 systems have several problems with the backwards compatibility for PS2 games. The 20 GB version seems to be the only one I haven't heard anything of.
Would that one work with PS2 games?
And would there be any way to extend the disk space from 20 GB to something higher? I can imagine 20GB won't last too long for someone like me.
There is a table of SKUs on wikipedia if you haven't already seen it (http://en.wikipedia.org/wiki/Ps3#Retail_configurations).
Unfortunatly all of the four models that had backwards compatiblity, are now discontinued and somewhat hard to obtain.
The hardware models were meant to have a higher title BC count, but the software models should still be pretty good.
Check out http://www.us.playstation.com/Support/CompatibleStatus
As for extending storage, the hdd's are replaceable. There are many guides around on how to do it, check out http://www.gamersreports.com/article/43/