Truth be told, I have not heard a tube power amplifier. All the tube setups I have heard in showrooms, audio shows, and friends’ are all integrated. With the exception of lab12 pre1 and suara that I auditioned alongside Lab12 Integre4. The Suara is excellent power amplifier btw and do consider auditioning it if possible. Looking through audiogon earlier there is currently a BAT V56SE for sale. I’ve heard BAT’s higher end stuff and they were certainly impressive.
I would not assume more watts automatically mean bigger sound. My Cobra produces less than half the power of my Lab12, yet it throws bigger more expansive sound.