In addition, I saw soooo many threads about artifacting in R9 280x cards again. This is not 10 people... but many many more. In some cases, the fix is bios flash, or lowering clocks/raise voltage. But I don't want to buy a brand new card, which I have to RMA few days after it's arrive. Of course, not all cards have this problem. Type "r9 280x" artifacts in Google. It seems ASUS is the most affected.
EDIT: It seems, that GTX 960 prices are dropping.
Yoy say that R9 280X is good "for now". I think it's right. I will wait for next GTX 960 price drop, or GTX 960 Ti, or maybe save some money + wait some more time, and buy GTX 970 to be more "future proof".