Upgrading from radeon 4850, ~200$

[pizzown]

Current system specs:
os: windows 7 64 bit
cpu:core i7 920 oc'd to 3.8ghz
mobo:asus p6t deluxe
current video card: diamond radeon 4850 http://www.newegg.com/Product/Product.aspx?Item=N82E16814103060
psu: antec 650w http://www.newegg.com/Product/Product.aspx?Item=N82E16817371010
ram: 3x2gb ocz gold 1600
case: antec 1200 (all air cooled)
resolution: 1680x1050

I'm looking to replace my very very unstable and hot 4850 (120C playing SC2 with 100% fan speed WTF?! until my computer shuts off that is) it was fine for like 2 years but the frequency of the crashes has increased too much to be bearable any longer (even some crashes in hon which is really odd).

The games I play are cod and bf, with a splash of hon and sc2. I do want to have some extra power for the ever increasing requirements though.

Just looking for a high quality single video card that won't make me want to slam my head into the monitor due to technical problems. Because of my traumatic experience cool/quiet/efficient cards are a plus.

Ive been looking at radeon 6870s and gtx 560s specifically the msi twin frozr models for both.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127545
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127593

But I was wondering if there are even better buys that may even be cheaper or better for what I want. And in short the things I want are performance, cool, quiet (the things everyone would like huh?)

Oh yeah and I run a 2nd monitor sometimes but just for open browsers while I'm gaming or something.

 

[Cygnus x-1]

They will perform similarly, so what ever company you prefer. If you can afford about 40 dollars more, a 6950 or a GTX 560ti would be a more substantial upgrade.

 

[pizzown]

Best answer selected by Pizzown.