20GB, 60GB and 80GB PS3 Owners-How good is the backwards compatibility?

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I have a 60gb and thus far BC has been flawless, aside from some skipping sound in Shadow of the Colossus. I've played through MGS 1-3, GoW 1/2, Jak 3, Shadow of the Colossus, and a few others so far, and I'm going to start Rogue Galaxy soon.