I just bought a MacBook about a week ago after using Windows for years and I am thoroughly enjoying it so far. I immediately noticed the attention given to visual detail that makes the experience more enjoyable.
I wanted to point out that any answer will depend on you plans for the computer. I myself do mostly web-browsing, document creation (Pages/Word), presentations, and I'm hoping to play around with GarageBand more and more. I bought the lowest end MacBook (with educator discount, free printer (with rebate), and free iPod nano (with rebate), and it has worked very well for me so far.
I'd say that if you're not planning on much gaming or heavy visual work (like with photos, 3D rendering, and the like), get the MacBook.