Hey guys, I'm planning to upgrade my '09 13" MBP to a newer model this year. I know of rumors of a 'completely redesigned MBP' this year, but I'll be getting it separately upon its release. As such, I'm in a dilemma of choosing between these 2 MBP configurations: 1) 15" MBP with a 2.2GHZ i7, upgraded hi-Res Antiglare screen, 8GB RAM, 500GB Serial ATA Drive @ 5400 rpm. 2) 15" MBP with a 2.2GHZ i7, upgraded hi-Res Antiglare screen, 4GB RAM, 750GB Serial ATA Drive @ 7200 rpm. Which configuration would produce faster processing results in everyday tasks like photo/video editing, Safari, iTunes, etc? Thanks in advance!