I'm about to remove my Mackie HDR 24/96 hard disk recorder from the studio racks because I never use it anymore.  This will free up a dedicated video monitor I could use as a dual display for my DAW #2.  DAW #2 is a 3.06 GHz dual core Pentium running Windows 7 Pro x64.  Any recommendations for or against any particular dual display graphics card to share?  Thanks!

If *possible* audio latencies concern you, then it is best to avoid an nVidia card.

I often advise folks to check out benchmarking (http://www.videocardbenchmark.net/high_end_gpus.html). Start at the top and work your way down the right side till you run into your price point range and start comparing them.
 
If one day, you "may" go to more than 2 monitors, this will also affect your choice.