Since Beyer T1 have 600 ohm load, they should greatly benefit from being balanced IMHO.
"I like to look at it as a future-proof type of thing."
"I used to own Phoenix with HD800."
How do you like that combo compare to WA22? Phoenix priced at $1200 USD, there are only few hundred dollars gap, ofcourse tubes cost money too.
It's more like $2400 vs. $1200.
Twice more expensive, if not more, imo.
As for Phoenix vs. WA22, I'd wait until it gets proper burn-in and what not. I tried out briefly with stock tubes and Mazda. Mazda definitely makes it less boomy/muddy, and definitely improves by several steps. I am going to see how rec/power tubes upgrade will improve upon.