I'm actually looking to do the same thing, but haven't given any programs a go. I don't mind spending a couple hundred, but I'd rather avoid paying for a big editing program.
A friend of mine recommended Media Cleaner/Autodesk, has anyone used that? Here's the description (for the Mac version, although I'm sure there's a PC one as well):
http://usa.autodesk.com/adsk/servlet...&siteID=123112 ($600, though!)