Haven't received it yet, but last night I bought a Corsair HX1000 on ebay. The guy was trying to do single-wire sleeving on the ATX connector and broke off some of the pins. So, a little bit of time putting new pins on (and I think I might go ahead and single-sleeve it too), and I have a basically new HX1000 for $174 shipped. That's a good $60 off Newegg's price, just because the guy couldn't be bothered to learn how to crimp connectors.
...and, I just realized that since it's ~5cm longer than my TX750, I'm going to need to move my pump...ah well, it's time I made it a proper mount anyway.