What are the MOST stable/least artifact/TDR-prone 560 TI and 6950s?

[gameranew22]

Hola amigos. Been looking for a new card for about a week now and returned a horribly artifacting/TDR-ing HIS Iceq 6870 and am looking for advice on a new 560 TI or 6950 to purchase. I've never overclocked before but am good at researching and am confident I can do it if pointed in the right direction at first so I'm looking for a reference model rather than a factory OC'ed version I think (though I am open to all suggestions as I know manually OC'ing invalidates any warranties and I realize I don't know what the hell I'm doing...)

I'm currently looking at these cards:

560 TI
MSI Twin Frozr
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127608
Zotac ('cause it looks cool...I know how dumb of a statement that is....)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814500197
EVGA
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130604


6950
Saphire 6950
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102929
MSI 1GB
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125385
Saphire Dirt 3 Edition
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102945

This is my rig:
PPROXIMATE PURCHASE DATE: ~November-December 2011

BUDGET RANGE: USD $150-250) Before / After Rebates

USAGE FROM MOST TO LEAST IMPORTANT: Gaming [Metro 2033, Bf3, Skyrim, Bioshock Infinite, Max Payne 3, La Noire], AVID, home theater/watching movies, CS5, pr0n

CURRENT GPU AND POWER SUPPLY: HIS Iceq Radeon HD 6870 and XFX 750TX 750W PSU

OTHER RELEVANT SYSTEM SPECS: I5-2500k (Sandy Bridge), P67 ASUS Asrock Extreme4, 8 GB Corsair (Plenty of cooling in a HAF 912 case)

Country: USA

PARTS PREFERENCES: NONE
OVERCLOCKING: Maybe SLI OR CROSSFIRE: Probably (Eventually)

MONITOR RESOLUTION: 1920x1080

ADDITIONAL COMMENTS: Prefer Lifetime Warranty cards or from sites where I can return that *** if it breaks.

Also, boobies, and thanks!

 

[Mousemonkey]

Duplicate thread. Stick with the original.
http://www.tomshardware.com/forum/333463-33-nvidia-560ti-cuda#t2488008

 

[gameranew22]

Best answer selected by gameranew22.