This is a bit of an "educated guess", but hope it helps....
The cable companies run hundreds and hundreds of feet of RG-59 and RG6, and their signal is at a much higher frequency. If I recall... each signal of a component run is maxed out at 6 MHz (usually the bandwidth limitation of the DVD players). Therefore, it is my conclusion that 35 feed of component run will be no problem. Why else do I conclude this....?
I run about 35 feet of component to my projector from my DVD. Also, I run 3-foot RCA's to the wall jack. In the wall is the 35 feet of RG6 for each of Y, Rg, and Rb, and then to another wall jack... and another 3-foot of RCA (radioshacks gold jobs)... and I see very few easily noticable artifacts with the run when compared to just hooking my DVD player right to the projector with one 3-foot run of RCA's. I think my problem is that I'm changing types of cables twice, with non 50-ohm interfaces between the cables. If contemplated just pulling the RG6 a few feet out of the wall and terminating it with RCA's. It won't look as pretty, but I won't change cable medium so many times.
I think you'll be fine and completely happy with RG6, esp. if that's the ONLY wire you're signal will be traveling over. May I recoomend getting double-shielded RG6... just for extra goodness. It is only a few cents more per foot.
[This message has been edited by RobertCooper (edited 08-21-2001).]