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
Please could you provide more details on the the Elna caps and values. Also how long did it take to burn in before you found a change in sound. thanks in advance, Neville
"Please could you provide more details on the the Elna caps and values. "
I would also like to learn more abou it, but it looks this link is dead now :(
I use an Ayon Mercury II integrated amp and the sound it amazing. I believe 300b tubes are the best for the Duos. Bi-Wire the subs to take it to the next level.