I'm currently sitting in front of two Dell monitors (2405FPW & 2407WFP) along with a Wacom Cintiq 12WX and a 32" flat screen TV all hooked to dual NVIDA video cards that date back to 2007.
The 2405 is my main screen while I keep the desktop and tools on the 2407. I used to calibrate both monitors until I noticed that I was doing the bulk of my color work on the 2405. I use the 12WX to run the internet as well as the real purpose - fine adjustments to an image. The 32" is used to run final test on DVDs for fit and general style.
I'm in the process of looking for a replacement for the 2405 and will go to a 30" as well. Right now and only because I've had such great luck with the Dell monitors I'm leaning towards the 3008WFP Ultrasharp.
2560x1600, 3000:1, 8ms response time, 16.7 million colors; 100% color gamut and 0.250 mm pixel pitch. It's also DVI-D the same as both the 24's.
Of course there's the NEC LCD3090WQXI-BK30"
2560x1600, 1000:1, 6ms response time, 24-bit (16.7 million colors), 0.251 mm pixel pitch. DVI-D as well.
Both look good to me with the NEC being a tad more expensive. I've been using Spyder3Pro for calibration and can normally get the calibration to within less that 1% on the 2405 (and 2407 when I do it) and that's why I'm leaning towards the 3008.
Not sure if 4 active monitors qualify me as a glutton....