I just got a Dell 23" ST2310 1920x1080 for my IBM/Lenovo T61 for $60, its less than 2 years old. They guy used it for a dedicated HD DVD/BlueRay player. Less than 100 hours on it.
I got (a bit ago) a new Dell 24" ST2421L 1920x1080 for my Mac Mini from Best Buy for $123 on an in-store Manager's Special with a "coupon" plus a "rewards" percentage off.
I still have two serviceable Samsung SyncMaster 216BW (1680x1050 and made May 2007). Both will end up on my HP XW8400 once I fix both of them, they have faulty capacitors leaking voltage and causing *slow* turn on and brightness. Its a know design oversight on that generation of LCD monitors form Samsung. Replace it with a slightly larger and higher voltage Electrolytic, Voila, problem solved.
The two Dell monitors are a bit "bluer" to my eyes and a bit more pleasant to me... my wife K, can't tell the difference.
I have to say... 23" to 24" are about the largest I think I'm going to every have... they are almost to big. Even my iMac 24" feels a bit big.