Well after a bunch of comparing I finally sold my Boulder 2110 preamp and I am now going dac direct from Cascade to s500. It took playing around with interconnects to change my mind. Apparently Msb electronics are sensitive to them. I settled on AudioQuest dragon ICs. I also have a dragon power cord on order for the amp should be in next week. The s500 is going direct to wall while all else except my rel 31 subs which have been off for a while are plugged into the stromtank 2500 mk2. I am very happy.
Adding 2 more dedicated lines this week for the subs and then will try them with the s500 and go from there.
Lastly, curious if any have experience with the power zone, thinking of getting one to feed the amp, thoughts?