Hello Yorkie,
I am using a Shuttle SN41G2 with its own board FN41.
www.shuttle.com
It has built in Nvidia Geoforce MX400 VGA, with dual channel, and Sound.
I have had boards with built-ins before and was always wary, but both sound and graphics are excellent.
I use a Corsair matched pair of 256mb memory, but Twinmos and Crucial also work well.
The installation CD does all the setting to view a monitor for your viewing and a screen for the singers. It has a TV and monitor port on the back.
My CPU is 2500XP and the board is jumperless so most of the fixing is a doddle.
Its water cooled fan system is as quiet as a mouse.
You can pick a Shuttle up as a barebones system for just over 100 pounds ($185.00) on Ebay, maybe less if you're lucky.
Add your CPU and memory, transfer your hard drive and CD
player, install Hoster and you're away with the mixer.
You'll wonder how you ever ran a show before!
Regards from Chester, Cheshire.
Garry.