I've been a complete Dell convert (for their monitors only) since I picked up a 24" 2405FPW a few years back.
I'm now using the 27" 2707FPW (1920x1200) which works great for me in the dark or in sunlight (early morning if I don't have the blinds down). I got it from PCBuyIt.co.uk, who have an excellent pixel policy (next day replacement if there are any faults at all).
Monitor Size and Type : 27-inch Widescreen LCD Flat Panel Monitor
Resolution : 1920 x 1200 Pixels
Response time / Brightness / Contrast Ratio : 6ms / 450cd/mÂ² / 1000:1
I have no idea how it compares in terms of price/performance with others in the market, but I've got no complaints whatsoever, other than perhaps the amount of heat it pumps out, increasing room temps. (Only noticable if you're sitting right up close, mine is set 2ft back on my desk, so maybe 3ft from my face and I never notice it.)