Who's using Harbeth with tubes, what speaker model and how many watts per channel?

I use the P3ESR with Quicksilver 70 watt amps with KT88 tubes. I have used the same amps with the M30.1 and the C7s!

@jjss49 

Yes, everything matters. I am curious about what everyone is using and their experience. 
My curiosity starts with about 35wpc and C7, for example. While listenable, they don’t seem to come alive even at low to medium volume in a 14x16 room. 
I think Harbeth benefit from more power than people think regardless of amp type. I’ve owned C7, 30,1, 40.1 and have friends who own and love them (as I do). 
My hopes of using relatively low powered tubes is probably not realistic in my case. 
I remember visiting someone with a pair 40.1 using maybe 15wpc of 2A3 push/pull tubes and it was glorious with fairly simple music.

 I know posts disappear on the Harbeth forum with talk of tubes and power, etc. so I wanted to see what you guys were using. 

I'm currently using Harbeth P3ESR XD speakers along with my Allnic T-1500 Integrated 300B tube amp, 12.5 watts per channel. Sounds very good, I also use a pair of REL T7i subwoofers with all my speakers.

My Harbeth Super HL5 Plus started in my main system with 180 WPC Rogue Audio M-180 tubed (KT120) monoblocks.  They're now in my office with my Audio Research VSI55 50 WPC tubed (6550) integrated.  They sound great with "only" 50 watts, although I rarely play them loud in my office.

I like where this is going, thank you. Please keep it coming.