Quick update:
I installed Bootcamp with Windows 7 Pro x86 today.
Can't tell you how impressed I am: drivers installed all without problems, struggled to find a hidden mouse settting in the bootcamp menu to enable tapping and right clicks, but since it's running fine.
Gave 20GB to the Windows partition, and I still have 10GB left, 30GB still free on the Mac OS partition. I have yet to decide which OS I will run most, but I can tell you that Windows 7 is a super smooth experience.
And here's a personal opinion: I think that the antialiasing of screen fonts is far superior on Win 7. MacOS's looks very blurry to me in comparison.