My quick answer is run ground wire from the block to the house ground. This would allow you to use other types of coax that have lower loss for the signals and for the DC power for a preamp if needed.
The RG6 with an attached 17 gauge grounding wire is popular with the dish guys for a simple installation.
If you use RG6 without a preamp you are limited to your strongest signals. If you add your RCA preamp at the hilltop, there might not be enough voltage for proper operation with a long coax run. Pete Higgins has solved this problem by running extra wires for the preamp DC power and putting a voltage regulator and power injector near the antenna. This would be a custom solution rather than an off-the-shelf solution.
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