Looked at barefeats, Tom's Hardware, and several other sites. It seems the general consensus is that the Samsung Spinpoint F1 and the WD 640GB SE16 drives are among the two best, with the new WD VelociRaptor beating out both of them. I am about to order a 6GB RAM upgrade from OWC, as well as a few drives and was wondering what people's opinions were on drive configs. I was just going to order 3 of the 640GB SE16's and RAID0 them together, and use the stock 500GB in the MP as a boot drive. Would it be better to just order 4 of the WD's and keep the 500GB stock as a spare? I checked and couldn't really find too much information on comparisons between a stock 500GB MP drive and something like a 640GB SE16.