I don't have any specific speaker recommendations to offer, but I would suggest that if your listening includes anything with wide dynamic range, such as well-recorded symphony orchestra, a 90db speaker in a "medium/big" room, with a 10W amplifier, will not be adequate.
I have 90db speakers in a room which is only 13x20, with a listening distance of 10 or 11 feet. Listening to classical symphonic music, I've clipped a 20W vintage tube amp to the point where visible arcing occurred in the power tubes. Currently I'm using an 80W tube amp, which is adequate, but without a lot of margin. A 200W solid state amp I've used in the past was fine.
If the crossover configuration for your sub keeps the deep bass out of the low-powered amps that will help, of course, but on the other hand your room sounds like it is significantly larger than mine. I'd look for 96db+ if I were planning on SET or similarly low-powered amps.
Regards,
-- Al
I have 90db speakers in a room which is only 13x20, with a listening distance of 10 or 11 feet. Listening to classical symphonic music, I've clipped a 20W vintage tube amp to the point where visible arcing occurred in the power tubes. Currently I'm using an 80W tube amp, which is adequate, but without a lot of margin. A 200W solid state amp I've used in the past was fine.
If the crossover configuration for your sub keeps the deep bass out of the low-powered amps that will help, of course, but on the other hand your room sounds like it is significantly larger than mine. I'd look for 96db+ if I were planning on SET or similarly low-powered amps.
Regards,
-- Al