Bryston monoblocks 7B ST replacement

Belles Aria Monoblocks? $3K new
or
Ayre MX-R's, unfortunately more than $4K used, but would be my pick.
B

Thanks gdnrbob,
what have you found better in recommended Belles? Can you be more specific?

What sonic improvements would you like to achieve?

@rohlim ,
To be honest, I have no experience with Bryston other than knowing it is a reputable brand.
I bought my Belles Aria monoblocks due to a demo of the Aria Integrated at Audioconnection. That little integrated amp really outperforms for it's price.
Knowing that the sound is clean and lively, I bought the monoblocks for my Vandy VLR's and find them a great fit. I am waiting for Mr. B. to finish upgrading
 myAria Preamp.
 As I wait, I am using an Atmasphere UV-1.

Looking at your Vienna Beethoven's, I see they probably need lots of 'oomph' in an amp.
The Belles should be fine for low to moderate/normal listening. Though if you are really cranking them up, I'd go with something like Ayre or Pass.
If you are lucky (like I was), you can score a used MX-R pair for $6.5K.
Bob