Since Windows 7 is just being released I would say "do not install it yet" and wait some time until you can get some feedback from those already using it.
I know there is a way to have more than one OS in the HD and to have the PC/Laptop ask you with which OS you want to start, but in this case someone with more knowledge should give you a hand on that. I guess it is related to partition the HD and install each OS in each partition available; thus it has to be a High Capacity HD.
Since Windows 7 is just being released I would say "do not install it yet" and wait some time until you can get some feedback from those already using it.
I know there is a way to have more than one OS in the HD and to have the PC/Laptop ask you with which OS you want to start, but in this case someone with more knowledge should give you a hand on that. I guess it is related to partition the HD and install each OS in each partition available; thus it has to be a High Capacity HD.
Regards!!