That can work easily enough with an pre/pro but might require a bit of work each time you want to use it. I have considered it myself prior to this recent boom in the vintage receiver prices.
Regarding your original question, I have an H/K AVR80 MkII (going on 8 years old, i believe) and my parents have an H/K 130 receiver that replaced their Marantz SR2100 (I think that was the model). Granted, the SR was just past the peak of the marantz era, but there was no drop in SQ switching from the SR to the H/K. The SR was simpler to use and looks are subjective, i could see how one could prefer either of the two. I am just unsure of the longevity of the HK in light of most of the recent electronics being fairly disposable. I guess what it comes down to is this: Pay a good chunk of change to bring the Marantz back to as new condition and now worry about it for 15-20 more years, or sink the same money into the receiver, give you as good of sound and more features with the risk or having to replace in 5-10? I've had great luck with my AVR80 and don't foresee any problems in the near future.