Power amp s for Avantgarde Duos?


Hi, I'm looking for new amps for my Avantgarde DUOs.
I have had different tube amps, and prefer 300B/845/805..
Now I have Cayin/Spark 9084D, 845 monoblocks; but I have some problems with hum, and they are not the best with respect to resolution.
Noise is of course a challenge with these speakers.
I have recently tested a BAT VK-75SE, and were impressed by the dynamics and the fantastic bass slam together with excellent resolution and imaging. But the midrange (vocals) seem a bit "too neutral" (analytical?) to me........
I have a BAT VK-51SE pre amp, and Acoustic Zen Silver Ref IC's, Audience Au24 speaker cables (might be replaced with AZ Double Barrel.....).
Source: Pink Triangle Anniversary TT + Wheaton TriPlanar MkVII tonearm + Lyra Titan PU, and a Pass Labs X-ONO phono stage.
Room size 3.5 m (w) x 5.5 m (l).
Price range (new or used): up to $4000.
I prefer monoblocks, but no must........

Best regards Ola
olaps
Checkout the KR audio/ KR enterprise amplifiers. Quiet,transparent and powerful. You can get a pair ranging from originally $10,000 to $20,000 mono blocks for around 4 grand.The tubes aren't cheap, but the last a very long time!

Do a Google search..it will be tough to find a bad review on any of them. Here's a review of the Kr audio Kronzillas.
Google BWS Tubes, call Bruce Wenger and beg him to make you a pair of Amps. I have his electronics with Duos and the combination is excellent.
Some popular pairings are:
Viva, Lamm ML-1, Audiopax Model 88, Tom Evans Linear A and B (some folks I trust think these are the best),Tron. Probably lots of other good ones.