I was debating the exact same thing but I figured 512MB should be enough for quite a while and when applications start needing more than 512MB it will be time to do a major upgrade anyway. Plus, there is not much of a performance difference between 512MB and 1GB unless you deal with huge files when photo editing and what not. I mainly surf and play games so this should be fine for me. It's funny though because I was just about to go for the 512MB but decided against it.