When I purchased my Cambridge 851C I was able to compare the Marantz SA 8005 in the store through the same system back to back. The Marantz is good. But after about only 15 minutes of going back and forth a couple of times it became abundantly clear that the Cambridge was way better. Though I must say, not nearly to the degree of the other unit on my list of 3.
I brought the Cambridge home to audition it and also picked up the Oppo 105 from another store to compare them at home, having read high praise, thus completing the auditions of the 3 considered.
The only thing I can say is you definitely have to take reviews with a grain of salt. HUGE difference. The Oppo is not even in the ball park. Thin and uninvolving, sibilant, weak and thin bottom end, need I say more. From my experience I am at a loss as to the rave reviews, short of revenue dollars for the magazines. I also have a Simaudio Moon 230D purchased 2 years ago as I like two cd sources in my main system. Very good, certainly better than the Marantz I believe. The Moon 230D or it's brother the 260D can be found at reasonable prices used as well. Bottom line, the Cambridge would be hard to beat for much less than about $4-5K from what I have heard. All above in my humble opinion of course. Cheerio; Doug