Well, frankpc, things are a bit worse than you thought, because although the Nvidia GeForce GTX 950 and 960 are technically capable of HDCP 2.2, they have not been enabled on these cards for HDMI. See here
By the way, I see you were active on another thread
referred to in that second link, so maybe you saw this already.
Here's my take on this: having been a bit burned myself on HDCP 2.2 with my circa-2014 4K TV and AV receiver, and having just narrowly escaped the vortex of limited 4:2:2 chroma sampling on my TV (both of which I talk about in the blog post I posted before), I would not rush to build an HTPC today if you're dead-set on HDCP 2.2. There are no devices that output this content, and claimed support for it is worthless if there's no way to test it.
Same thing happened to me early on with a 2006 Denon receiver with an early implementation of HDMI. Basically, it didn't work due to terrible handshake issues, and Denon never admitted there was a problem. In part, that's probably because they couldn't adequately test it the first time around.
Whenever copy protection is involved, it's pretty much assured that all the cards are on not
on the table for manufacturers, and they're nearly as in the dark as consumers are.
Long story short, I wouldn't expect to find a definitive answer until HDCP 2.2 content arrives. If you'd like to build an HTPC now, you should assume it won't have HDCP 2.2, but it's virtually guaranteed that video cards released next year will have it, so you can always add it then. You can then continue to pass audio via the motherboard's HDMI to get DSD audio.