I'm researching the SR-7300 and/or 7300ose for friends and family... it seems like a solid performer, but a few months back, there were indications on the various forums that there was a recurring minor bug in some of the units... this was in the form of a low-level hiss or whine which was audible when no sources were being played. Search yielded nothing... any owners out there who have experienced this?... if so, has Marantz come up with a satisfactory fix? One more question... where was your 7300 manufactured? Thanx in advance!