Playing 3d Vision for 1 week now and it is amazing. Almost impossible to go back to 2DVision thereafter.
Playing on a Sony FW900 CRT. Tried the Samsung 2233RZ also, but prefer using the CRT because of the better image quality.
Hopefully more 120 MHz LCD monitors will be availabe soon. The current product line of LCD's are looking antique now IMO.
Left4Dead with 3dVison is a blast, Far Cry 2 is great either, even Fear2 is shining now.