So I'm in the situation I'm getting either the basic 27" Model, or the Upper Spec (no customer orders, just what comes as standard) I'm looking for some basic stuff (Xcode, Web browsing, iPhoto etc) which I know either machine will handle. Additionally we'll be doing some gaming - Sims 3, Starcraft II under the Mac side, and a whole range of games on the Windows side, from Star Trek Online to Sim City. I'd like to hear people's thoughts - is the upgrade worth the extra £200 from a gamer's perspective? I've tried reading around the subject but can't quite come to a conclusion. Any advice greatly appreciated.