I needed a sensitive autoguider (the NI5 just didn't cut it), and I also wanted a mono planetary camera, so I pulled the trigger on this today:
http://www.zwoptical.com/Eng/Cameras/ASI120S/index.asp (ZWO ASI120MM-S USB-3 1.2 MP autoguider/camera, 3.75 micron CMOS pixels)
Very excited! It got a great write-up in AS&T this month (QE 74%, uses the same Aptina Mono CMOS MT9M034 sensor as the QHY-5L II), and with a USB 3 connection and 72fps at full frame (1280X960, or 320X240@254fps), it's going to scorch...
Will post up my review once it's arrived and I've had a chance to muck about with it in its triple role (autoguider [with Metaguide], planetary camera [Firecapture] and uncooled DSO imager [can expose for up to 17 minutes and save as 12-bit TIFF]). That is, after the obligatory post-purchase clouds finally clear
If anyone has used one of these, post up here how you've gone.