I was just interested in your guitar routing. Good to know the ADAT is working out. A while ago, I listened to a preamp shootout from SoS - I think it was SoS - and the Behringer sounded good. I think it was the 8200.
I have the ADA8200. Nothing really to say about it, except little "flimsy" plastic gain turning knobs.
I've made a video of the set up. I hope it's clear enough. I had to set it all up again, back I had packed everything up, when treating my room. This was the worst setup of my life. I spent 2.5 hours on it because I had some weird humming, that resulted in feedback... I tried everything... Turned out it was the Babyface Pro inputs doing it. I still don't know what that was about, but I ended up using the ultragain's input, which worked fine.