Ok so first off I'm a long time lurker first time poster and have anxiously been awaiting the new imac refresh and now that it's here, I just want to make sure I get the proper system for my needs. So I plan on getting the higher end 21.5 model. However I'm wondering if it's worth it to get 8 gb of ram vs the 4gb standard? Now I don't play alot of PC games but I would love to run Starcraft 2 close to high-ultra settings as possible. So will that extra 4gb of ram help SC2 run smoother or is that overkill? Also anyone with the new macs yet test out how well SC2 runs on them? Thank you. Edit: Also is it worth it to upgrade to the 3.60GHz Intel Core i5 [Add $180.00] ?