Hey everyone. I just purchased a new late 2011 MacBook Pro (15 inch model, 2.2GHz i7, 4GB RAM) and almost splurged on buying an 8GB RAM module from OWC. However, it costs $300 dollars and I already have an extra compatible 4GB module I could put into the computer to make 6GB. I don't do any serious video editing or photo editing (maybe on occasion, if that). Apart from that, would 6GB be sufficient for multitasking and some game playing (the Sims 3 basically)? Or would there still be significant improvement with more RAM, given what I use the computer for? Thanks in advance!