Just looking for some opinions from everyone. Currently have an oldish white macbook with a 2 GHz processor, 1 GB of ram, and the Intel GMA950 graphic chipset. With the new MBP release I'm ready to upgrade but I can't decide whether the Nvidia 9400m in the top end 13" is sufficient or if I should go with the mid range 15" with the dedicated 9600M GT option. I'm a casual gamer who plays WoW, age of empires, the sims and does some casual website design (nothing overly gpu draining). In your opinions will the 9400m be sufficient for this? Also, if I went the 15" MBP route is there a noticable difference between a 5400rpm serial ata hdd and a 7200rpm? I noticed the 13" doesn't offer an upgrade option to a 7200rpm hdd, if I bought one to install myself would the 13" support a 7200rpm without overheating/battery draining? Cheers!!