Just some feedback about my 730 from my incredible technician: "I'm'a say I like it more than any other HK I've worked on for some time. Really! I admire how it's built, and its cosmetics, and of course it sounds good (pardon the expression). I could do without the unconventional FM tuning meter, but I'll grant that it's innovative.
As it happens, there was a 930 at XXX that overlapped with your 730 here at home. IMHO, you should not lust after a 930, despite it ostensibly being the TOTL of that era. I was really struck by how much better the 730 is built, and how the 730 has an FM stereo decoder that is of a later (and definitely superior) generation of technology..."