Gah, I don't think I'll bother with X99. I don't need 12 threads, and while affording it is a non-issue, I just can't justify spending nearly €1000 on a motherboard, CPU and 16GB of DDR4.
Performance on the other hand, particularly a workstation, there's no beating it. Although it's a pity the turbo frequencies are as low as they are though. The two 8-core Xeon E5-2687V2's that are in my workstation at work turbo up to 4GHz. No way Intel is going to sacrifice their huge margin Xeon business though.