If you're into games and graphics generally, CRT's are in my view superior and offer better value for money. TFT's, especially cheaper ones have a low response rate and can 'smear' ie can't cope with fast moving images as well as a CRT. Ideally, it's best to go and see various models in action, as a monitor that one person likes may not suit another. Having said all that, it is sensible to check out reviews of various models, as in PC Advisor. If you go for a CRT, you will see that Mitsubishi are No.1 in both the 17" and 19" charts and have been for a long while.
I have just bought a new Mesh Pc and upgraded to the Mitsubishi Diamond Pro 930 SB 19" CRT. It is excellent and the best image I have yet seen. By the way, I am heavily into games as well as using Photoshop.