polyurethane vs oem rubber

the old truck seems a little sloppy driving around and I was thinking of rebuilding the suspension this fall/winter.

I'm thinking of replacing the rear leaf spring bushings and in front doing control arm bushings, strut arm, sway bar end links, and bushings

what materials are better, I've heard the poly pieces are noticably stiffer and sqeak, and are the graphite impregnated pieces better than the plain red? I just find that the ole thing is sloppy and is showing its 200,000 km age and I want to try to restore the ride to what it use to be

any info:prayer:??? experiences would be appreciated

thanks Jim