With 91dB speakers I wouldn't consider anything less powerful than an EL34/6550/KT88 amp like the Ella. I listen to 91dB speakers with an Ella (great), a 300B (OK for music that's not too dynamic) and a 2A3 (grossly inadequate for anything but solo acoustic guitar). There are several good EL34 amps out there and the Ella doesn't have the boutique quality parts of some of the more expensive ones, but it's a very good value for the price. Just my two cents.