Some months ago I shopped around for a new CD player. In my search I looked at the FMJ and the CD92, as well as the Cary 303/100. I liked all three a lot, but found the Cary just a little sweeter, warmer. Needless to say, when I found a Cary CD 303/200 here on Audiogon for $400 less than a new FMJ, the decision was easy.
In my search I also listened to a Rega--the Planet not the Jupiter--and to me, it just didn't seem to provide the same kind of "life" (which I think is the appropriate term here) that the two Arcams and the Cary did. Again, I didn't listen to the Rega Jupiter, so it may be a case of apples to oranges. But to tell the truth, I liked the CD92 and a Cal CL-15 I auditioned better than the Rega Planet--check it out, too, if you get the chance.
Subsequently, when I put the Cary in my system, my Audio Physic Tempos opened up like tulips, like clear sky in the midst of a rainy summer day. In short, the music became wonderful.
In reference to your question regarding why so many Cary 303/100s are being listed on this site, it might have something to do with the fact that the Cary 303/200 came out late in 2001. Upgrade?
In any event, good luck in your quest.