meh I really don't care
I'm used to windows so that's what I am going to use
OSX is a great OS too bad you had a lousy user experience due to the poor quality hardware. I wouldn't give up on it entirely. If you're near Microcenter in fairfax (same place I live, GMU grad...) or the tyson's apple store, check out OSX on a Mac Pro (desktop) and you'll be very impressed.
But it really comes down to applications -- I'm guessing since you go/went to VT you have some science/math degree. OSX is great for this as it also runs Unix apps. Unix is still predominant in the university science setting (mathematica, etc).
Still there's really nothing wrong with prefering windows b/c it's what you know. Windows does do some things better and let's face it, there's more software -- and as someone who uses both in my business it's very very annoying to have to buy both versions of a software package.
Still if I had my choice I'd go all OSX because it's a much cleaner OS. Not as crufty as windows, nor as insecure. But with XP as long as you play it extremely safe, it's OK.
There's also some really cool apps that aren't available on OSX like this:
http://www.securstar.com/products_drivecryptpp.php
If you're looking to upgrade to a new windows notebook you might want to check out the new T61 series from lenovo. It's super cool (50C peak operating temp) and much more sturdy than the MBP.
I ordered a T61 for about $1300 (3 yr warranty, 2GB RAM, T7300 Santa Rosa, 100GB 7200 SATA, XP Pro, 14.1" 1440x900 screen).