Rega Saturn R VS Rega ISIS

Can i get some feedback about the Rega Saturn R   VS  Rega ISIS. I just recently bought the Saturn R { Demo } and purchased the Rega Reference power cable. Absolutely love the sound of  Rega Saturn R.Extremely analog. I do not stream or listen to Lps. So my listening is only cds. I also own a Krell KPS 20i that i compare the Rega Saturn to while listening to cds. And i can honestly say that the Krell KPS 20i has a bass to die for and is somewhat brighter than the Rega Saturn R. I honestly love both players. And the Krell KPS 20i is an absolute bullet proof tank. Quality is second to non . I do love the Rega Saturn R so much that im thinking of maybe selling it down the road and picking up a used Rega ISIS either valve or solid state. Any i would like a first hand experience with some people who had or have the Rega Saturn R and compared it to the ISIS. My system consists of Krell FPB 600, Mark Levinson 38s , Krell BAFs. Rega Saturn R , Krell KPS 20i , Straightwire Crescendo speaker cable and interconnects.