^this. Also, I'm a "he", dude/dudette
Sorry! I will assume then, that English is not your native language, as I can hardly imagine a guy using "aunt" in his handle; an "aunt" is the name given to a parent's sister (an "uncle" is the parent's brother).
FWIW, I am an uncle; my brother and sister each have three kids.
At 1080p, I can hardly imagine where a HD7850 will be insufficient. I CAN imagine where a GTX660 might be though, in the future. Current games don't rely on GPU compute performance, but what if a future game does? The Kepler cards are crippled in this department. If a future game or application needed that, you'd be hosed.
Is a HD7870 in your budget? That's another viable choice.