I still haven't replaced any parts on this Zenith and it really does sound magical. The music from it is just stunning. I mostly listen to classical music and some blues.
I'd be nervous to replace anything for fear of ruining the good sound it does have. I'm keeping an eye out for another one in case this one does blow up.
Thanks for all the great advice and info you've given me in this thread. Really great stuff.
Zenith, the quality goes in before the name goes on.