If I recall correctly, the reference versions are all the same. These cards are not quiet at load, but not as loud as the 480s. If the prices are the same, I would pick EVGA AR due to lifetime warranty compared to the Asus card. However, I see that the Asus card is cheaper on Newegg.
All reference PCB GTX470s have out of the box voltage control with EVGA precision or MSI Afterburner. As a result, voltage tweaking of the Asus card is not a selling feature in this case (as it was for HD5850 for example).
Palit makes a non-reference card, which Newegg also has for sale. It has
2x80mm fans and the PCB is shorter than the reference design. This card has a standard HDMI port instead of a mini-HDMI port as found on the reference cards and also includes a display port. This card runs cooler and quieter than the reference design but more hot air ends up in your case. This card supports overclocking in MSI afterburner.
The
best 470 is probably the Gigabyte SuperOverclock. But at $310, that's too expensive.
Overall, either go for the cheapest card - Asus (3 year warranty) for $210, EVGA for $233 (so $23 for lifetime warranty premium) or
Palit for $260 for a quieter/cooler design but you only get 2 year warranty. The problem with the Palit and Gigabyte SoC cards is that you can get an HD5870 for
$270. So in that case I'd pick the Asus if you plan to upgrading in the next 3 years, and the EVGA if you plan on keeping the card for longer than 3.
Also, consider
$220 EVGA GTX460 FTW @ 850mhz. It's quieter than the 470 and runs cooler. Its performance is
very close to the 470, without the noise.