I bought the macbook over the pro due to the price. The pro isn't unaffordable, but at the price I would not be comfortable updating unless the machine was falling apart. With the macbook, I wouldn't feel as bad selling it quicker and updating to a newer version. I don't do a lot of heavy lifting so the ~$700 puts me close to the price of a replacement. I could also get at least $400 for my old machine on ebay. So, when the MBs get an LED backlight display and a significantly better graphics accelerator I will upgrade and not feel 'guilty.'
Glenn
Glenn