Again this is very much a personal view, and their are definitely two camps on this. I have had a 19" Taxan CRT monitor for the past two years, it is a good quality monitor and very hard to fault in any way.
This weekend I went out and bought a 17" TFT, (AOC LM720A)
Besides opening up my desk space immensely, the quality of the display and the vibrancy of the colours are breath taking, only been on it for two days now, but will never go back to the big beige box. Good luck with which ever you choose. J.