I can add, regarding compatibility issues that you can always download Ubuntu, burn the image and boot your machine with it (this is what is called LiveCD). This will allow you to dry run Ubuntu from the CDROM/DVD without even installing it or formating your machine.
It's a great way to see if everything is compatible out of the box like video cards, sound card and network adapters.
If its not working straight out of the box, I'll start searching in Google and the Ubuntu Forums if there is a quick fix for it.