@disolitude: Isn't the SteamOS based on Linux? And don't AMD Linux drivers suck? (Honest question here as I only know what I've read on forums).
@ofrm1: AMD's R9 290 is also a good choice: it's cheaper than a 970 and almost as fast, plus with a non reference card heat is not a problem if your case has good ariflow. Yes, it's more power hungry, but unless you plan to run it for +10 years during several hours a day, it will still be cheaper than a 970.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.