Ok, had a go at it again and now have things running as they should. When I was stuck with my original problem (k7000 issue with the included switchres version) I must have messed with a bunch of other settings in desperation. My last report of the full black screen was from GA attempting to load a different front end that I had selected at some point. Sometimes it would crash and drop me back to the linux window manager. After I figured that out and set it back to the default front end (from within a terminal out of the front end), I could run the sample games, but the refresh and resolution were sub optimal and looked terrible. I finally went back to the base liveCD, chose generic 15.7kHz arcade monitor (avoiding my original issue) and it loaded up exactly as expected and the sample games looked great.
So my next steps will be
1) redo the USB install to replicate results on the liveCD
2) update switchres and replicate with k7000 settings
3) Update to latest version of GroovyArcade (need advice on best way to do this)
4) Try with a few of my ROMs
5) If all goes well to this point, then will dump my Win7 setup and install on the main HDD
6) Settle on a better front end and spend the rest of my days destroying all who challenge me at SFII

Thanks again for all of the help.
Rob