I my learnings with 'woulda, coulda, shoulda', I would agree with UB and make it possible to run cables inside and out from top floor to basement. I would also run CAT5 and such like Nakman said.
The grounding suggestion is also great and necessary. I would recommend flat copper sheet 1" wide in leiu of the 8 ga wire because it will allow better results due to electricity flowing on the surface of copper rather that the entire body. More surface area, more efficiency and better grounding characteristics. I would also recommend 220 30A service along with the 110 20A service devoted to the HAM shack. The reason for the 220 is for the amplifiers.
Blue '99 UZJ100 2" Lift, Replicated Outback stackable drawer system, Engle 63 QT, Custom Front Bumper, Gamiviti Shorty roofrack.