GIGABYTE Super Overclock Series GV-N470SO-13I GeForce GTX 470 (Fermi) 1280MB 320-bit GDDR5 PCI Express 2.0 x16 HDCP Ready Video Cardhttp://www.newegg.com/Product/Product.aspx?Item=N82E16814125338&cm_re=gtx_470-_-14-125-338-_-Product
That's the one I would go for. It is supersilent with an Arctic Cooling Acelero Extreme cooler. I also like what they say about their "binning" process:
GIGABYTE GPU Gauntlet Sorting
Gigabyte’s proprietary database analysis system evaluates the GPU core engine, shader engine, and memory, and selects the qualified GPU processors for upcoming maximum overclocking ability and stability test using proprietary professional testing toolkit and Graphics benchmark (FurMark and 3DMark Vantage). Final power switching and stability test will pick up those GPUs with the best power efficiency and lowest power consumption, which are qualified for the Super Overclock Series. Thus, the Super Overclock Series have been factory overclocked at optimal stability point (Super OC point), an exact balance between high frequency and efficient power consumption.