I've been waiting to get a Macbook since last September. I won't be using it that much (use a desktop PC as primary computer) and have a tight budget. Now that Apple have both CD & C2D refurbed Macbooks, I'm not sure which to get. Are the benefits of C2D worth $150 (the difference between 1.8 Ghz CD & C2D)? I've heard that temperatures are a bit lower and I guess you have the option of 802.11 N?. Was much done in the new revision? Thanks in advance!