best for video transcoding & Editing

Which would be the better card for video transcoding h264 to mpg or avi and eventual video editing. And is the difference worth the 50.00 price diff?

9800 GTX+
GTX 260 Core 216

This system would not be for game play.
I do not plan to use the SLI.
I will be using two monitors.
AMD dual core with 16 gig of memory running Vista 64, soon to be Windows 7.