Hello there, I am wanting to buy memory for my MacBook. I live in the UK and have always used Crucial in the past - I highly recommend them. My MacBook came with 1GB of ram, in the form of 2 x 512MB. Here are the prices for RAM for my system: 4GB (2x2GB) is £58.27 2GB (2x1GB) is £32.89 2GB (1x2GB) is £29.13* * If I get this it means I would have 2.5GB of ram in my system, however it won't be in pairs. Would you recommend I get 2x1GB and have 2GB of ram, or get the single 2GB module and have 2.5GB but not in pairs? The 4GB is tempting... considering it was £72.74. What would you get? I imagine there isn't a bit jump from 2GB to 4GB performance wise unless you're running photoshop and stuff? (which I'm not). Oh decisions!