You know, VMWare Fusion is good enough that I used my MBP for years with a full copy of Windows 7 on VMWare Fusion. By using a virtual desktop and full-screen mode, along with hardware video acceleration, I got an almost perfect native Windows 7 environment that i used probably 60% of the time, but with a quick 3-finger swipe to the left, I had a full seamless OSx environment and with a quick 3-finger swipe to the right, I had a full, seamless Linux environment.
These gestures, combined with the virtual desktops and the multi-touch gesture support made the Mac my favourite platform ever.
One caution, if you're an avid Windows user, you may be frustrated with how the special keys Alt-Ctrl, etc map to the Mac keyboard. Fusion offers the ability to remap them, and you can do some of it in Windows as well, or you can just learn that Ctrl and Alt are in a different location than you might expect.