Hey, Ive just found a good deal on some Samsung F4 2TB 32MN cache ecogreen drives http://www.amazon.co.uk/gp/product/B0042SGDVG/ (i paid £61 not £102) I want replace the stock 640GB drive in my 2009 24" imac Is this a good choice? I know that 7200rpm drives would be faster but with the current prices i just couldnt afford it. Anyway, I use my imac for web broswing, Lightroom and make some very basic home movies in imovie. Will that drive be fast enough? I have 8GB RAM if that makes a difference?