The best rca's i have had experience with are the "twisted pair" kind, as this design will cut out most if not all induced noise. Even the best shielded cables will still pick up some noise. But remember that most noise can be avoided by proper installation of power and rca's, and most importantly a good, clean, tight ground will prevent most noise in a system. Our cars seem to be pretty good with having little noise too. Also, a good, fully charged battery will help with noise too, as a battery is a natural noise filter. It helps filter out the noise caused by the charging of the alternator. So if your battery is bad, you have a greater chance of getting some noise in your system. Most major rca's manufacturers make twisted pair cables, and they aren't any more expensive than the monster cables..I'm not even using this type of rca, but i have some good shielded cables, and i have NO noise whatsoever..The optima yellow top battery helps out greatly too...not to mention my grounds are bolted to the chassis with a 1/2" bolt and nut.

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)