Well, I have a 22" WS and love it. However, I would like the functionality of having Photoshop & Premiere open on 2 different screens, so you don't have to constantly flip back and forth.
If it were me, I would shoot for 2 19" if you have the space.
I'll say this, having had a single widescreen for over 4 years, i could never go back to a normal screen. The other 2 techs here at work have 2 19" panels and its nice if you have a lot of programs open at once, but for gaming a single widescreen monitor is better.
To be honest, anything under a 20" widescreen is going to be disappointing in games and unless you are in a really tiny cramped closet you should be able to get 2 20s on a desk, although they might hang off a bit.
To be honest, anything under a 20" widescreen is going to be disappointing in games and unless you are in a really tiny cramped closet you should be able to get 2 20s on a desk, although they might hang off a bit.