So Curious question here. Is there a significant difference between the core duo and core 2 duo processor? Reason being: I can get a black macbook 2.0 ghz with 512mb for $1199 but its a core duo.. Vs. the $1400 core 2 duo which does have 1 gig of ram, but I can always solve that problem in the older model fairly cheap. Is there any real performance value in the core 2 vs. the first version? Thanks for any input.