I have the Onkyo 806 which I have been happy with except for the lower pre amp levels. I had to buy a ART cleanbox to hook up my QSC RMX 2450 amp for my sub. I have come across a excellent deal on the 8003 that I can not ignore. So I have the upgrade-itus again. Can anyone that owned one tell me all the good stuff about their Marantz and also, how the xlr levels matched up with pro audio amps. Did they push the pro amps normally to clipping stage matching the rest of the audio without any problems? I have heard that the XLR route is the absolute cleanest way to patch equipment together so to not get the hum from ground loop.