Only recently I found out that the R9 graphics line from ATI was build upon the HD7000 series and so on. In any case, the guys were going up with the numbers like crazy. Setting on R9 as name is a good choice.
While R9 280 is build upon an older HD7000 graphics card, the R9 285 is a totally new thing. From that point on we’re talking new type of graphics cards and the 285 crushes the 280 and the GTX 760.
You can rest assured that if you buy a R9 295 you’ll all set for at least two years, until the game developers find out how to use more of your computer’s resources. For now, if you wanna buy a graphics card choose one starting with R9 285 and above. Great and quite cheap.