Power conditioning for digital gear AND tube amp?

Maybe you should give Jerry a call at Audio Magic. I use a AM mini Ref with a blue dot and really like the combination for my digital gear. And I think you can expect that he will return your calls and emails.

Jriggy,
Have you considered a medical grade isolation transformer?

Jriggy - Chris isn't interested in helping you? Did he say that, or just that you haven't been able to get in touch with him? I know he used to be full time with building BPT stuff, but when things slowed down a couple years ago, he took a full time job somewhere else. I think the BPT stuff is the best price/performance conditioning out there, so would say keep trying him. He's usually very good at getting back with customers quickly. Maybe he's been on a vacation?

But you are probably right about buying new. The big balanced units are VERY heavy, so a couple extra trips in shipping would probably eat up any savings over buying used.

Have you done any improvements on your dwellings VAC such as a higher amperage dedicated breaker/s with corresponding wire gauge, possibly uninterrupted BX metal clad from breaker to receptacle?

I would consider the Purepower units as well.