I have the Swiftech 8500 series, same as the 22500 with a smaller radiator and it works fine w/ my Geforce 3 and P4 2.6C. The graphics card RAM is a big concern though. You might need to purchase seperate RAM sinks if your going to watercool the GPU, it will depend on how the heatsink is setup on your card. The only problem I have with the 8500 is the radiator is too small. I ordered the dual 120 radiator and should have it in a week or so to make a good comparison. (same one that the 22500 has)
Maze CPU and GPU waterblocks are also supposed to be very good. Check out
Dangerden