Esoteric DV50 - What is the next step up?


I have recently heard the Esoteric DV50 and just love it ! Within the Esoteric line, what is the next step up for 2 channel cd quality? I play redbook cd's mostly and some SACD. I don't need the video portion at all. Any thoughts are appreciated and I am interested in previous maodels better than the 50 as well.
Thanks!!
billandsol