Hello Everyone, I am currently using a 13" Black Macbook MacBook3,1 Intel Core 2 Duo 2.2 GHz 1GB memory and 150GB HD, running OS X 10.5.8. I recently went into a mac store to inquire about upgrading the RAM to 4GB, HD and OS to either snow leopard or lion. They suggested a Seagate SATA 500GB 7200 RPM - 2.5" 16MB Cache and 2 2GB 5300 667 DDR2 SO-DIMM Apple RAM at close to $500.00. I feel I can find less expensive pricing on my own and save on their labor charges. Just not sure on where to the best place to buy RAM, which brands to consider, which to stay away from and what brand and type of HD to consider. Any comments or help would be greatly appreciated!!