I might ditch hackintosh altogether. Definitely not getting AMD. I'd rather use my 12" MacBook on my monitor than to get an AMD card. Not worth the price difference between a 980 Ti and a Vega 64. Still rockin' that i7-2600. Oh well, it was fun while it lasted.
AMD cards are far from perfect as well. There are a lot of issues with getting them to work perfectly. I switched from a NVidia to AMD and even though the card is working for the most part, I'm getting random system freezes. Also, there are some issues with getting hardware decoding to work with 4Xx/5XX series cards.