I have the Asus Dark night 1GB card. It is a nice card. I have it modestly oced to 825/1050. My ambient room temps aren't all that low and my case airflow is moderate so it idles between 48-51C. However this is with a fan profile set in Riva tuner to 35%. The stock profile sits it at 50% which is sorta loud for me. It will sit at 46-48C at 50%. Not that it is LOUD, but I have CoolerMaster silent fans in my case and a Sythe silent fan on my CPU. So when the card fan spins up you can tell. However my buddies computer has ALOT of airflow and you can not hear it over that loudness.
I like the HIS cooler as it blows the hot air out the back, and i've always liked their ICE-Q coolers. It's $25 extra but worth it. It was $40 move when i bought my card otherwise I would have sprung for it.