Sanp it up. Not that its any comparison, but I have a VSX-9500S made by pioneer, late 90's. I know lots of people thing anything after 1980 is bpc, but honestly it seems pioneer still made some REALLY well made stuff after the vintage age died. I would buy that amp in a second, I guarantee you you won't be disappointed. These usually weigh a good 30-40 lbs, not because of cast metal framing, but because of good transformers, as well as an excellent power supply. Huge caps, Huge heat sinks... at 680W power in, i'm sure yours is no differnet.
Currently I run my VSX with some Wharfedale 60's - if that isnt an odd combination, I dont know what is. I love it so much the unit barely turns off.