Thanks -
I got around to setting up some test scenes on it and so far, so good. Seems to have plenty of headroom, and runs pretty snappy. No complaints, yet.
I've also been able to deal with the resolution issue with a set of drivers that actually allow me to run the screen in a slightly squashed 1024x768 mode. Regardless DMXis runs fine even in 1024x600 mode. If you auto-hide the Start bar, you only lose a few pixels at the bottom of the app and no functionality.
Now - the real test - to have it run an actual show.