Will upgrade GPU this summer, GTX 780Ti or AMD R9-290. Which would you recommend, and why? (including which R9-290 is the "best")
The GTX 780ti is more powerful but is also $200 more.
Both are more than enough for maxing out at 1080p.
Whichever one you get, get a model with a custom cooler. Especially with the 290, you DO NOT want the stock cooler.