http://qhyccd.com/ccdbbs/index.php?topic=1341.0
http://qhyccd.com/ccdbbs/index.php?topic=916.0
http://qhyccd.com/ccdbbs/index.php?topic=1468.0
http://qhyccd.com/ccdbbs/index.php?topic=1457.0
http://qhyccd.com/ccdbbs/index.php?topic=1298.0
http://qhyccd.com/ccdbbs/index.php?topic=1291.0
http://qhyccd.com/ccdbbs/index.php?topic=1306.0
plenty more on the QHY forum.
Personally, i prefer the ICX-285 CCD sensor. Second hand, they are going cheap in some models.
Take your time, and dont concentrate on just one camera. There are many out there with good overall performance..
You can always revert back to your original plan if you cant find anything else for a bargain.
Theo.