Die_Kapitan wroteI say wait for Polaris, that's what I'm going to do, you'll save a lot on power compared to CF R9 390X and you should expect better performance for less than the 390X, think Fury/Fury X performance for a $300 card that only uses 150W.
PS: if you want to go all out, Polaris isn't for you, Polaris targets the mid-range, while Vega (which will be released in Q1-Q2 2017) is what will bring HBM2 and high-end 4th gen GCN cards to the market. Alternatively, you can go with the best Polaris card and upgrade when Navi comes out in early 2018.
Word to the wise friend. There are just so many rumors I'm really hyped to see what they'll come up with. I'm hoping that Vega will be a breakthrough and take hold of the high-end performance to price market for a while and leave a good impression on consumers.
Hopefully they maintain the level of overclocking potential their cards usually have. I'm going to have a field day.
Polaris seems more and more appealing; it's going to be relatively cheap, can undertake 4K VR, and its performance is somewhere between the Fury X and the 390X. Also power efficiency. Good thing about AMD cards is that I can CF different cards so I can maybe get Vega later anyway if I'm not too busy with other things and maybe sell the Polaris for a Vega if I see bandwidth speed bottlenecking thinga too much for my taste. Yep, definitely wait for Polaris. Can't go wrong imo.