Ergon carbon/suspension seat post is kinda pricey & one might wonder about quality of knockoff versions. I'm currently using German SQLabs saddle with "Active System" elastomer dampening that seems to give some extra cushion with virtually no added weight.
IMHO touring bikes should have front/rear elastomer suspension: combined with aluminum frame the weight would be about the same as non-suspension production steel frames & furthermore obviates need for heavy wide tires for most roads. Elastomer allows shorter frames & better handling & saves the energy of shifting body weight over bumps. Some Paris-Roubaix pro riders use elastomer, why don't avg tourers have this option?