any flat screen will do. The problem with any screen (including the apple ones) is that the colours are not true, they will all have a varying degree of colour difference. We have dell, viewsonic and phillips lcd and LED screens and I must say though that the LED colours are much sharper. Just make sure you get your swatch books if you’re planning on doing graphic design for print.
I’m using a 22" Benq G2222 HDL LCD monitor.
I agree with dvdb with regards to screns having different colours. I run a dual screen set up at work.
My other screen is a 19" Samsung 940N and the colours are completely different. No matter how hard I try to match them up, they never match.
The bigger the screen the better IMHO. I find that when I’m using a 17" screen (which I use at home in dual screen setup) I get frustrated at the lack of space to drop windows. Everything appears to be cluttered on my screens at home, but the same applications at work seem much more friendly with the extra space on the 22" screen.
Cheers