Ps Audio BHK Signature vs Parasound Halo A 21+

Thanks , my speakers are a pair of Dynaudio Contour 20

Damn it George, Last October I upgraded from my old dspa1 to outlaw mono amps with an older outlaw processor, then couple months bought the 60xt and have been pretty happy.  Lately though I've been wondering if the 60xt can sound even better than they do with better amps. I'm glad my s.o. doesn't read these forums. The halo 21+ has me wondering. 

There is more to amplifier design that the kind of output transistor used and the choice is up to the designer.  And not all speakers are in the same difficult to drive category as Wilsons.  Hell my old JVC boom box uses bipolars   but it doesn't compare to my Pass amp.
 

Your question is impossible for any of us to answer reasonably. The better amp is the one that sounds better to YOU, with your system in your room. None of us can predict that.