I think this is tube endgame for me. I took a shot on this after owning the DarkVoice 336se and I have no regrets (totally didn't need an excuse to buy more tubes).
It took a bit of getting used to having to balance the L/R channel manually, but it's really nice to be able to center the vocals when you get used to it.
Effortlessly powerful, I didn't use stock tubes for long, comes with random cheap Chinese tubes. So ymmv tube sound-wise. Even with stock tubes the amp is warm and detailed though (I am feeding it some Schiit though so DAC choice may also obviously play it's part).
Would recommend.
ClementNApologies I don't monitor this, so stumbled across it much later.
It's been so long I can't remember exactly what I grabbed for tubing, I'd been reading through some forums to find ideas on what would be good.
For the v1 slots I'm using a pair of matched RCA 5693 Special Red tubes, for v2 it looks like some form of matched 6AS7G tube, labeled RCA 7304 on both tubes.
Very warm sound overall, smooths out biting sibilance really well while still being clear and powerful in other areas. Tubes are all a little different though, and it's going to depend a lot on your chain, so I hope you found something that fits with your setup :)