Which graphic card to upgrade to with this current system ?

icestars7

Honorable
Feb 7, 2014
1
0
10,510
I7 930 2.8 GHz
GTX 470 <--- too hot (average 85c when gaming) and loud
6GB of memory
Mother board: Asus P6X58D premium
Budget range: optimal at $200, but willing to spend up to $300 if really necessary
Goal: casual gaming without bottleneck

Can you guys give me 3 options from high to low price ?