If you are going to run "super-cold" the CHV-z would be the best choice. If you are not likely to do more than just use very good water-cooling, then the Asus Sabertooth 990FX Rev 2.0 would be just fine.
This is the board still being sold thru NewEgg.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131877
ASUS SABERTOOTH 990FX R2.0 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard with UEFI BIOS
There were some Sabertooth's named like this > ASUS SABERTOOTH 990FX GEN3 R2.0 that had some issues with them. About the time we saw the problems NewEgg no longer was selling the GEN3 boards and I have not seen them appear again since the problems we saw some users seeming to have.
I think I saw one user come in the AMD Mobo Forum section and say that he had no issues at all with his GEN3 Rev2.0 Sabertooth, but still none have come back for sale at NewEgg in nearly 2 mos now. Asus must have felt there was a problem and stopped shipping the GEN3 board.
Otherwise that is all that has come thru here that is seemingly up to date.
RGone...
PS: IF and that is IF you lean more toward the CHV-z board, by all means go that route as I doubt it would not satisfy you. I was only thinking the currency thing. I am and have been since Mid 2012, been very pleased with my CHV non-z board.
RGone...Again.