Looking for a piece to complement my Parasound Halo A21

Hey y'all.  Looking for some help here.  I've been scouring the reviews, looking for a mid-fi 5 or 7 channel amplifier to match up to the Marantz pre-amp and the Parasound Halo.  I'm considering something in the A/B Class of amps.  I have a Rotel RMB 1565 Class D, but looking for a little more power while keeping it transparent. I need to shop the used market, but looking at Anthem, Emotiva, Parasound, Sunfire, Acurus, maybe even Proceed for the right price.  I would like something the the 200 watt range, as I am driving the 4 ohm Martin Logan Motion 20's with Motion 8 Surrounds.  Thoughts?