With the room size and speakers I would go for DH/SET.
I use old Bottlehead 2A3 DH/SET mono block amps with wide range single driver speakers and previously used an Audion 300B DH/SET.
The output tubes I use (Visseaux, Ken-Rad dual flat plates and RCA's) now cost more than I paid for my amps and preamp.
I'm not familiar with the new Bottlehead offerings, or anything else recent for that matter.
Of the amps you list the RM10 stands out for it's unusual but really great sound.
Think it's been almost 20 years since I listened to Decware (one of their first 83/El84 amps).
What amps have you used with the Omega's (just curious).
DeKay
I use old Bottlehead 2A3 DH/SET mono block amps with wide range single driver speakers and previously used an Audion 300B DH/SET.
The output tubes I use (Visseaux, Ken-Rad dual flat plates and RCA's) now cost more than I paid for my amps and preamp.
I'm not familiar with the new Bottlehead offerings, or anything else recent for that matter.
Of the amps you list the RM10 stands out for it's unusual but really great sound.
Think it's been almost 20 years since I listened to Decware (one of their first 83/El84 amps).
What amps have you used with the Omega's (just curious).
DeKay