Well I took the plunge and bought me an ST-237, so my webcam days are past. ;^)
I have a SAC IVc with everything that comes with it including the software. A well made low end astrocam with both t-ring threads and a 1 1/4-inch nipple. Images as slow as 1/4 of a second shutter speeds, so some brighter DSO's may be possible with it, but it shines as a planet cam. Check out the SAC website on the Astromart sponsor list. It has all the details. Includes Astrostack offchip integration program. $150 shipped. One note: This camera works fine, but has one "dead pixel" that occasionally shows up as a full intensity pixel where there shouldn't be one. Easily fixed in processing, and doesn't happen all the time, but I just wanted you to know.