I'm looking at buying a refurb Macbook. I have two options. A; 2.1GHz Core 2 Duo 1GB RAM Combo Drive $699 B; 2.0GHz Core 2 Duo 2GB RAM Super Drive $749 The RAM is inconsequential, as either would get put up to 4GB. B wouldn't need the upgrade as soon though. Which should I go with?