Just my 2 cents worth but if you really want to run windows then you should get windows optimized hardware to make the most of it, Macs are made to run OS/X.

I have run windows (I still stick with xp!) for years on my mac both through parallels and bootcamp, purely to run windows only software I have found that running via bootcamp has much better performance than through the VM. If you plan on using your MB as a Windows machine you definitely need to go down the bootcamp route, I know others have mentioned partition space etc however you can access both the windows and mac drive space from either o/s for storing files just not for installing applications.