I am about to buy an outboard processor or an updated receiver for my Sherbourn 5/1500.I just sold my Yamaha RX-V2092 and I am ready to take the plunge.I have looked at used B&K processors and the Parasound 1800,Sony TA-E9000ES,Denon 3300 and Denon 4800.I need your opinions on the ones mentioned and others.I would highly appreciate your help.Thank you