Easy choice as I would go with the amplifier that sounds best to me. The only spec I would consider is power output to insure there is enough there to properly drive my speakers.
Objective vs Subjectiove…
Would you rather have an amplifier that measures amazing, extremely low total harmonic distortion, sky high dampening factor, and the like, but for whatever reason doesn’t sound very good to you in your stereo system? Or would you rather have an amplifier that doesn’t measure as well, but sounds absolutely amazing in your stereo? Which would you choose?