I haven't heard the Cary but the 777ES is fantastic in nearly every way. I really thought of replacing my AA Prima mk2 with one but in the end, the AA won for me. However, the 777ES is a real detail and resolution machine with superlative dynamics. It was all a bit too much for me actually - the Prima has better texture and more accurate timbre which are things I value more than detail for the sake of detail.
For an audiophile, the 777 is hard to beat for the money and its build quality is second to none. For a music lover however, the Audio Aero Prima Mk2 is the best I have heard in my system (and I've had a dozen CD players).
You should also consider the Musical Fidelity A308. It is massive but beautiful to look at as well as hear. It will be smoother and a little more forgiving than the 777 but still an outstanding player. I haven't compared it to my Prima in my system but I think they are fairly similar in style. But I am a tube guy and for digital, I find tube magic is essential.
Arthur