Planar PX2611W 26" or Doublesight DS-263N 26". Or if you can wait a bit, the DS-265W is apparently about to replace the 263.
Your only other choices last time I looked were the NEC 2690 or 2490, both of which are much more expensive than the Planar or Doublesight, and in the case of the 2490, also smaller (24").
Apple cinema display 23''
LG Electronics Flatron W2600HP (not sure about the US name there is a TN and IPS version)
HP LP2475W might be worth the wait.