It's pretty difficult to find one without a mic and none of the ones without a mic are any good.
The Logitech Quickcam Pro 9000 is excellent all-around. The Communicate STX, as mentioned earlier, is also pretty decent, though it will lag pretty noticeably in low-light and has some artifacting (if you where dark clothes, you'll get weird white sparkles. Also has a tendency to overemphasize purple).
Personally, I'd just get the Logitech Quickcam Pro 9000.
Sadly Logitech is the #1 company for consumer grade web cams. The new ones are using the CarlZenis lens. What I recommend you do is go over to Canada Computers, last time I checked they sold refurbished Logitech webcams at a substantial discounted price, Bought the portable Netbook one and the 9000 for my brother. All have worked flawlessy.
It amazes me how Logitech is willing to produce a quality webcam but then match it with doggy software that leaves a big foot print.