Hey guys! Sorry for this 1st stupid post but I need to upgrade my RAM from 4GB to 8GB for better Photoshop operation. I have a mid-2010 MacBook Pro running Snow Leopard. I have found three options at Amazon.com. Between these three, which one should I go for? Or is there a better alternative? Please help! Option #1: http://www.amazon.com/Kingston-Modu...9UKW/ref=sr_1_1?ie=UTF8&qid=1313170211&sr=8-1 Option #2: http://www.amazon.com/Corsair-DDR3-...F8ZG/ref=sr_1_2?ie=UTF8&qid=1313170211&sr=8-2 Option #3: http://www.amazon.com/Crucial-CT2KI...5YWI/ref=sr_1_5?ie=UTF8&qid=1313170211&sr=8-5 Your help will be greatly appreciated! Thank you in advance!