Does and don't

I don't think the Furman with the Bryston is a good idea.  I use a 15A Furman regulator because I have low-powered tube amps and my line voltage often drops to 114 or lower during the summer, causing the amps to under-perform.  But the Bryston is already well-regulated, so there's no advantage to adding a bottleneck in front of it.

Ty. Yes voltage bounces around during summer . Right now I've got 123 volt so this is the time to pump up volume .    As people say plug to wall but times my voltage drops to 113-114  and has big spikes.  Good old summer and it's approaching me . So plug in to wall is scary.

Install a whole house surge protector, and at least two new 20 amp dedicated circuits for your equipment.  Maybe $1,000 or less, to get you to better load capacity first, before buying other expensive equipment.  I just got done installing 4 dedicated 20 amp circuits for my Mcintosh amps, controller, and new REL sub.  Wasn’t that much more money for four circuits, then just one,