I'm looking at the new 15" i7 2.2ghz, everything else is base, except the HDD will be the 500 gig 7200 rpm. The thing is, I also have this extra 10% discount (so about $220). I noticed that upgrading RAM now costs way less than it used to (only $180). But is this still a total rip off? How much would just buying RAM myself cost? Would it make sense for me to use the discount to upgrade the RAM to 8 gig? Or should I just save money? Would the performance be THAT much better? Has anyone geekbenched an 8 gig setup yet? I plan to be using it for video, photo, graphics, and audio editing, and maybe some light mainstream gaming.