I'm a big fan of Reynaud speakers too...although they are certainly not represented well in the U.S. They have a "wide open" sound and they really sing with Class A and/or tube amps...
I've had my Trentes for about three years... With a 100w amp, they nicely fill an 18'x25' room, but at the size you describe, I'd bump up the ladder to the Offrandes (Reynaud's bigger monitor). The Offrande is very similar to the Trentes in sound, but "more so"...It can be a bit more forward, but your large room might require it...
I've had my Trentes for about three years... With a 100w amp, they nicely fill an 18'x25' room, but at the size you describe, I'd bump up the ladder to the Offrandes (Reynaud's bigger monitor). The Offrande is very similar to the Trentes in sound, but "more so"...It can be a bit more forward, but your large room might require it...