I spent a few hours listening to the dehavilland 845's with a Hovland preamp, Naim CDS3 CDP, and Von Schweikert VR4jrs a few days ago. I would hardly say they were veiled, although perhaps I could have used their larger GM70's for some music to generate greater volume. I was generally very impressed with the stock tubes, but I understand that some Chinese 845B tubes can dramatically increase the amp's potential: I found the midrange very detailed and a dramatic improvement over the Pass X350.
Tube rolling with the 845B from Shuguang
Tube rolling with the 845B from Shuguang