A 57$ gpu doesn't sound too promising though, I dont want something I can just get by, I need something reliable and that can get by with ease, no games would be played, full working office under monitoring doubt anyone would be stupid enough to put games on my computers.
Running a windows desktop and applications on multiple monitors takes very little graphics power, and the $57 GPU referenced above has more than enough capability to drive your three monitor setup. A $30 GPU could drive three monitors if it had the port and clock connection capability.
the $57 GPU does sound like it may have some lingering driver issues, so if you want to try something else, and don't mind using displayport (or an active adapter: http://www.newegg.com/Product/Product.aspx?Item=N82E16814998051) try this Sapphire: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102950. If you don't want to play the rebate game, this Visiontek would work too: http://www.newegg.com/Product/Product.aspx?Item=N82E16814129261
The GPU your suggested if you second post is serious overkill, you don't need to spend that kind of money for office applications.