Anybody ever heard of using a cable drop amp (for RG6) on a line where you terminate with RCA? I can't think of a problem with it, as audio is carried on that line as well. But if you run into a signal loss issue over a very long run, spending $50 on two drop amps would probably be the cheapest approach and should work.

Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire