My X1900XT idles at 47c. With the stock fan, the card reached temperatures in excess of yours (~95c), and it was really noisy. Games crashed frequently. I purchased an Accelero X2 and I've never looked back. It's now whisper quiet, and my temps have never passed 70c at full load.
Oh, and I also use ATITool because of its great control over the fans on my X2 (and the performance gains).
Oh, and I also use ATITool because of its great control over the fans on my X2 (and the performance gains).