Hey guys, I was thinking about upgrading the RAM on my base 2011 13" MacBook Pro from 4GB to 8GB. For those who have the upgrade, how's the performance? Is it worth the $80~$100? Can I sell my 4GB RAM to someplace? Any other worthwhile upgrades for about $100? Personally, I use my MBP for light gaming, iLife, iWork, Win 7 via Boot Camp, C++ and Java programming, Safari etc. And from doing those tasks, I can occasionally see a need in RAM with iStat Pro. Any input is appreciated 