Best Windows video card without a separate power connector?

Looking for opinions on Windows video cards for a PCI Express 2.0 16x slot.

Low noise and power consumption are pluses, so I am looking for something without power connector separate from the PCIe slot.

Based on price, performance and quietness, what do you recommend?

I think a Radeon HD 5670 may be the best bet for AMD. I don’t know anything about current nVidia cards.