I probably would not have my own mac if I had not purchased through work. They are expensive...and I got my mostly loaded at the time. The only thing more I could have had added to 15" macbook pro I have is another gig of memory but it just wasn't worth the extra cost for 3gb! I did upgrade it to a 7200rpm hard drive though...which apple offers as on option on the 15's now!
I run OSX and Vista simultaneously 5 days a week all day and it works very well for me. I use parallels to run Vista within OSX, really the only time I full boot into Vista (bootcamp) is when I want to play game.
Anyways! I'm looking forward to the OSX release!