High-End Graphics Card for a mini-ITX build

PC-NOOB

Honorable
Jun 18, 2013
15
0
10,510
This is the build I am going to do soon. Already narrowed down all parts except video card.

BitFenix Prodigy Black
i5-3570k
CoolerMaster Hyper 212 Evo
Corsair TX 650M
Kingston HyperX 8GB
WD Caviar Black 1 TB
ASUS P8Z77-I Deluxe

I don't know which high-end video card to buy. I will be using this for gaming (high settings) at 1920 X 1080.
Price Range: 400-500