Custom Sea Life Velocity T3
Although
CSL closed shop a some time ago,
Champion Lighting still distributes these pumps.
They have a pretty fair price of $160
here (Tech specs and graphs on this page as well).
I found one of these pumps on ebay for $120 a couple years ago (a bit much, but they were scarce at the time). $160 seems a lot for a pump, but they are well built and are backed by a two year no-fault warranty. The performance is also decent.
My only beef with these pumps is that they can get quite hot and *do* add much of this heat to the cooling loop (power consumption is 140W).
My own use of this pump was limited to about 4 months (DD RBX mounting issues destroyed 2 cpus, drips shorted vid card, lost all desire to watercool). I am planning to put it back into service when I can afford a system worth watercooling again. The new system will actually justify the head afforded by the T3 (remote radiator).