tough call- the A51 is very hard to argue with for the price- also BLEW AWAY my B&K embarrasingly.. and I don't think the B&K is bad either... its rather decent, but the A51 put it in its place- AND did so at a remarkably low price. The classe is very close- I might give a slight nod to A51 because of the power- it just has a little more of the "it" that makes a good SS amp great..
Classe CAV 180 VS Parasound Halo A51
Looking for opinions on these 2 amps, both are special order items so I can't do a home audition, I am using Aerial 8B speakers, thanks