Mostly for my own records:
Since one of my two Samsung 940N 19″ monitors (bought in 2006) developed a horizontal line through it, I’ve replaced it with a 23.6″ Philips 247E3LSU2, which was $168 from Officeworks.
Bigger monitors wouldn’t really fit into the space.
It’s plugged into “Calculus”, the Mac Pro. I should get a DVI-D cable to get the best picture quality out of it… amazed at how damn expensive they can be retail. I’ve ordered one from DealExtreme instead (no particular rush – the VGA cable I have may not be optimum, but it works).