laid back stereo power amp

get one of frank’s power amps if you like his preamp, solidly built very good sounding gear

another option is to try a wyred 4 sound st series class d amp ... upper registers a little smoothed over, solid bass control, something the maggies appreciate

third option is an odyssey amp, they have a somewhat silky presentation also

Audio Research Ref 75 or Pass XA60.8. I would not use anything less powerful. Going up either line is fine. Atma-Sphere M60 would be another good choice. 

Parasound.

McIntosh MC202.