think I may have to move to a highly efficient speaker.
I’m not sure that’s the case depending on how loud you listen, room size, and the type of music you listen to. Valvet states their amps are quite capable of driving many speakers despite their low stated power output, so I’d definitely ask Valvet what they think. My guess is you may be surprised how well the E3 can drive your DeVores and that the combo will sound absolutely sublime, but that’s just a semi-educated guess FWIW.