I'm experiencing some issues with my MBP. It's a 2009 model so it has the C2D CPU and it's the 13" version. It has come to the point where I can't even load www.engaget.com frontpage without the browser freezing for a while. Having a bunch of tabs in the browser open also seem to make things slower. Occassionally the computer also gets really slow, i.e. the entire operating system. I'm wondering if this could be because I only have 2GB of RAM-memory. Would an upgrade to 4(or 8)GB make things faster? And if you recommend this upgrade, is it only possible to get the 1067MHz memories or can I go with 1333MHz memories?