I've finally dropped some $$$ into a new MBP. Getting 15" 2.2GHz with high res glossy screen plus the Radeon 6750M. I plan on using it with a 27" LED Cinema Display. Two questions; Can the lid be closed on the MBP, and the desktop showing on the 27" ACD in the monitors native res of 2560x1440? What performance can I expect playing any of Valve's Source based games using above setup? i.e.: Portal, Team Fortress 2 or Half-Life 2. Any links to credible benchmarks always appreciated.