I have a four year old 13" Macbook running the latest version of Leopard. But it overheats whenever I place it on a cloth surface for more than 15 minutes and has a thermal shutdown. I'm constantly using the computer and I have daily Time Machine backups but I'm paranoid about the laptop failing altogether suddenly cause if it does, I would be without laptop for a long time since I cannot afford a new macbook air/pro now. I only have to hunt around for the best used macbook deal. Now, the macbook is almost good enough for all the work that I do. It could be faster when using Lightroom though. Now, I have found two good deals. One is a 2008 January 13" Macbook Air 1.1 with 80GB HD in tip-top condition available for my taking at $530. But, I'm afraid it might be underpowered, even as a backup/transition computer. The other deal is for a 2008 March 15" Macbook Pro with 200 GB HD, 2GB RAM and 512 MB graphics card available for $680. It is $150 more and also has a DVD drive that does not read or write DVDs. I'm not sure about the battery status but everything else looks good. What makes the decision difficult is that I don't really know what I want! On one hand, the air is cheaper and everything just works. I will probably run the faster and "cooler" (myth?) Snow Leopard on both my macbook and air if I get it. On the other hand, the pro would be a significant upgrade and help my lightroom work a lot (plus I could go for Lion) although the fact that the dvd drive doesn't work would nag me. Which would be a better way forward for me?