I have never heard of this one before! It looks very cool. If I didn't already have a QSD-1, I might go for it. I like the fact that it is a dedicated QS decoder (no stereo, pass-through, or switching capabilities).
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3284&item=5707363276&rd=1
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3284&item=5707363276&rd=1