Thanks for the tips so far. I'd never heard of Drake's Fortune, but I'll be getting that - just checked it out on the IGN video review and it looks great. Apparently, Oblivion on PS3 is better than on 360, so I'll be getting that at some stage, too. Call of Duty 4 I will be getting at some point as well. Thanks for the link, too, TBK, never heard of that site before.
I should have mentioned that I have a 360, so I already have GTA IV and a lot of dual-platform titles. I hear Haze is a bit dodgy, though, but what game reviewers enjoy isn't necessarily what gamers like. I'll check it out further.