Over the years i've been reading reviews on selected "high end" A/V Amps & Receivers there is usually a small comment which usually says: "an RS 232 or serial port for future upgrades" My question is, what future upgrades? I thought most manufacturers incorporated upgrades into the next model! I've not seen many firmware updates for "high end" A/V Amps & Receivers. I know that any firmware updates would have to be done by a authorised dealer/service agent. I would rather wait for a newer model to be launched with those updates included! Wouldn't a better use for this port to connect to other A/V or Hi-fi components or a computer as part of a central HC/Hi-fi/home automation system? or, in this day & age a DIY firmware upgrade could be done by anyone with internet access, a serial lead & the knowledge on how to do the upgrade?