I've successfully moved my personal system over to a Koolance PC3-720BK water-cooled case. It took me a lot more work than I expected, and the result isn't as quiet as I could have hoped (the case itself is fairly quiet, but the sum total of all the other devices is still loud), but I'm reasonably well satisfied. This is my second attempt at water cooling (my first attempt with a first-generation Koolance case ended in disaster), and I'm still a trifle nervous, but it seems to be working out well so far.

Once I get the last few kinks worked out, I'll put it through a stress test and write a review.

For reference, my previous case was a Lian-Li PC-70, and I was using a Zalman 7000CU CPU cooler.