If you go for a TFT ensure it can display true 16.7 million colours and not 16.2 million, its is not so much the number of colurs but the method in which the monitor reproduces the correct colour. I suggest a search on google will provide more detail than I can give here.
Also most 19" monitors have the same dot pitch as a 17" when displaying 1280x1024 as well as 22" monitors have the same dot pitch as 20.1 when displaying 1680x1050, therefore the smaller of the two has better clarity, get my drift?
Most importantly whatever you go for it should be calibrated to ensure correct colour display, although it makes no difference to me because I am colour blind!
Better to ask a stupid question than make a stupid mistake.