Spending thousands on another amp is a waste of money. The Bryston is an excellent and reliable amp. You will only be fooling yourself to think that a newer amp will somehow sound better and more "musical".
But a pair of Brysons would be able to use shorter cables and also have some extra headroom and ease of power supply punch.
If one was prone to liking Canadian gear, then there is also some goodness in a pair of Brysons.
Personally I would consider running a pair of Brysons as mono blocks, over a big spend up on fancy cables.
Even if it was a pair of stereo amps doing hi/lo on each side.
… but I have always liked mono blocks and short speaker cables.