Multi zone amps

Looking to set up a multizone (kitchen and living room) system at home. Am looking to use B&W LM1 speakers (2 speakers/room) on wall mounts and a HSU VTF-1 sub in the living room. Doesn't have to play different inputs in each room, but is important that I can play through A and B speakers at the same time. I know that Denon Amps (and probably a number of others for that matter) can do this, but wondering whether there is a better option for quality out there. Digital inputs aren't critical (could buy a DAC).

Any recommendations for an amp (new or used) at around the $500 mark, that could meet this need, would be much appreciated.

Thanks!