We just went through the same thing as well. Went to Best Buy and got the cheapest. Turns out it's pretty good (Envision 19" flat screen, less than 200.00). Liked it so much that we bought another one (same size, Westinghouse, less than 200.00) for the second PC.
Pitched the old giant monitors at our local town recycle program.
The only thing is that now I feel much more eye-strain. Big screen, too close, too high = eye strain. Can't go more than 20 minutes at a time.