"If you're buying a ready made PC getting a really quiet one can be a bit of a problem. Laptops aren't any better - when they get warm and the fans kick in they can make a lot of noise." - treewind

Except for Macbooks. Noiseless. That's why I always use them.

Barbara - if you're going to record music and you are determined to a laptop, I strongly advise getting a macbook. The learning curve isn't steep at all.