People pay $4500 for an Alienware machine, and I know that not everyone does that because of its "power", people want a nice looking machine. There are plenty of people that think that a Dell Dimension or XPS looks like crap, and these people are perfectly willing to pay an additional $500 for a machine that does not look like crap.

For serious; I have a feeling we'll see a pretty active market in XP/Vista running Apple machines in not too long. Why else do you think the community was able to cough up $14000 to get someone to figure out how to install XP? Not all of them wanted dual boot. I for one am going to order a couple of mac mintels, simply because they are the smallest dualcore machine I can find with BT and WiFi. They will make perfect little servers. Heck, if it works like I want, then I might start selling them myself on Ebay with an XP license...