Small Question regarding HDD

If you're already using W7 as of current, Acronis can do disk cloning with no problem. A clean install is always preferable but sometimes people like me are lazy and just want to transfer everyone from old drive to a new. But if your system is going to be different, it'll give you more problems trying to fix and change things, so you're better off doing a clean install.

Replacing a hard disk - same computer - you can clone
Replacing a new whole system - fresh install please