QUOTE (blue_6006)
Not as efficient but better SQ

in what respect??
if you have a look at decent mono-blocks, they have equally as high SNR's compared to a 2 channel amps as well as having better lower octave frequency responses
btw efficiency IS sq. You are obviously going to get more solid bass if the monoblock is capable of producing short bursts of bass from minimal current, as opposed to bridged 2-channels which often require a capacitor to perform on the same level