Tonight I was able to spend some time with the DHT thanks to Vinnie coming over for a few hours of listening and fun.
Here are my initial thoughts:
Want to add weight, texture, depth, layering, and more without sacrificing speed, slam, and clarity?
Get a LIO DHT!!All kidding aside, the DHT takes what the AVC/Tubestage offers and makes it better.
Don't think traditional SET sound...that isn't what the DHT offers. It is not overly sweet or liquid sounding and is definitely not a traditional tubey sound that is rolled off at the extremes.
We tried two different tubes:
The stock 2A3's that ship with the LIO DHT and a pair of SV811's that Vinnie used at Axpona.
While the 2A3 tubes were excellent and bested the Siemens CCa Grey Plates that I use in the AVC/tubestage LIO, the SV 811's could really rock and added some additional body and texture that fleshed things out.
Highly recommended!!Here is a quick picture taken from my phone:

George