Hi Brian,
i have auditioned a system which used Ohio Class earlier this year. i did NOT remove equipment from the rack to A/B, as this audition was not about the isolation. What i can say is this...i have never, ever, ever heard a system so tomb quiet yet live. And have spoken at length with the guys who set it up...they like the SRA stuff a lot. To give you a sense as to the company the SRA were keeping, it was an all Tidal system (Sunray plus the 6' dual tower subs), Tidal reference 3-stack pre, Stahl-Tek digital, 3 pairs of Tidal monos, Argento SMREE cabling, and the Tripoint Spartan and the Tripoint ground unit as well. So a vaunted class of equipment. It was set up by Tidal themselves.
I guess my point is that Ohio is in a very good class, used by serious people, and the company gets a lot of respect from people in these pages. The only other isolation product i can think of that i have used which might be worth a comparison is HRS which was stunning when i used it. i have never A/B'd HRS v Ohio Class full-on racks, but have auditioned systems which were on HRS racks and personally do use some of the smaller HRS products at home...and remain amazed. (i had a rack custom built by a high-end custom cabinet maker who is also a serious audiophile.) my two cents and hope it is helpful...pls update us!