Hi, I posted a few days ago as I am planning on buying a new macbook pro this next week. I've decided I'm going to get the 15" i7. However I have a hard drive question... The one that comes with it is 5400 rpm, but for £40 more I could upgrade to the 7200 rpm. My question is how much better is the upgrade? I plan to use the machine for photoshop, illustrator, indesign and flash mainly. Also some light gaming such as World of Warcraft, TF2 etc. Would I notice any sort of difference to performance by choosing this option? Thanks!