7B3 vs 28B3

[LewL]

I am putting together a system for mostly vinyl and some streaming. I will be using an Audio Research REF 6SE pre-amp with an ARC 3S phono amp. My speakers will be Maggie 20.7. My audio advisor recommended a pair of Bryston 7B3 mono amps. I am tempted to bump up to a pair 28B3 monos. In a 24’x12’x8’ room, is there any benefit of going with the 28B3 instead of the 7B3? I listen to everything from classic rock to country to classical to blues to big band to acoustic music at sane, but sometimes loud, volumes. Are there any downsides (other than price) to going with the 28B3 over the 7B3? The 28s look like they have a beefier build to them.

Thank you,

Lew