Since you don't game I'd recommend the Radeon 2400.
That would give you HDCP so you can use hi-def, should you chose to, and it's a a good home theater PC card so if you decide to get a TV Tuner card you'll have no problem with it ( All-In-Wonder cards aren't being made any more and nVidia doesn't have one either. ).
It will do a better video editing job then on board and it's inexpensive.
Check it out here :
http://www.newegg.com/Product/Produc...82E16814102699