Final Cut Pro is a bit of over-kill, and I doubt you'd want to go through the learning curve. Final Cut Express is a much better choice, easier to use, and A Lot cheaper to buy.

You can also get the Flip4Mac plug-in that works with Quicktime, FCE, FCP, etc. That will convert any video file into most anything you want. We use it to make quick WMV files from existing large and high-quality MOV files. It does a better job than VisualHub for that.