I love my 15" MacBook Pro as well.
Just wanted to chime in here and mention that I've been using it since mid-February (I was a very early preorder and this was my first Mac) and I had begun to get complacent with it... I just got so accustomed to it working so quickly and easily, that I wasn't appreciating it anymore.
I know this now because I sent it in yesterday for repair (loads of issues... ugh, revision A....) and I'm now using my IBM T42 laptop... WOW. For one thing, I feel so encumbered by Windows since I've gotten so used to being able to do virtually everything from they keyboard. Plus, my apps just work so much better on the Mac! Firefox in particular... for work I have 3-4 Firefox windows open, each with 4+ tabs. In Windows, I feel myself waiting around for Firefox to do something, but on the Mac, Firefox flew!