Small world...
Prior to mothballing my system (Anthem AVM Pre/Pro, Bryston 4B ST/9B ST and the SL3's), I had replaced the Anthem Pre-Pro with an MRX 500. My center was a Cinema, rears Aerius i's and an Earthquake Supernova 12 on LFE. The MRX500 did OK... the listening area is a combo living room, open to the kitchen on one end and staircase on the other. All this coincided withe the arrival of my kid, 8 years ago (jeez... so much for "temporary reconfiguration!), so I never really got to push the 500 in HT listening much. It seemed to do the job OK, and on the occasion when I was alone at home and wanted to rock out to my 80's collecction, it seemed to handle the SL3 quite authoritatively. Funnily enough, the MRX 500 had a powering up-related issue quite early on (right after warranty expired)... sent it in, got it turned around really quickly, and it's been functioning just fine since then. Currently my bedroom receiver, driving KEF RDM-based system.