I have a 24" Dell right now, but it feels too small. Thinking of upgrading to the 30" when the prices drop.
Hi, I am web designer and doing freelancing work also. So just before 3 days purchased Dell black 21'' LCD. Have good experience with it.
For your kind of work you can use 22" Samsung Full HD Monitor with 5ms Response time and 10000:1 contrast ratin with touch sensitive buttons in just less than $200.
I have dual 24'' inch monitors, very convenient and saves me a lot of time, especially while designing web sites. Both are Samsung.