I can find a G2 160Gb that works out to £1.25/Gb and a Vertex 2 240Gb that works out to £1.31/Gb. Obviously far cheaper than the 510 and the Vertex 3 (once it becomes available). No idea yet on what price and capacity the G3 will have if it does actually become available. So, on a 2010 i7 Macbook Pro, would I notice a real-world difference between the 510 and the G2? I am assuming that the G3 will be similar to the G2. Would there be a real-world and noticeable difference between the Vertex 2 and the G2 or the 510 on my machine? I realise that I am restricted to SATA II but wondered if the newer drives would provide a noticeable difference in speed or if it is better to get an older drive for less money. I use my machine for the usual stuff along with CS5 for image and web work and some video encoding.