I agree that the JC cars have better detailed sides than the Walthers cars. Since I am a pennsy fan, the GGD cars worked out great for me. They were better detailed than the Walthers cars I had and the original sets were only about 125 per car.
But if you model any RR that did not use Paired window coaches similar to a P70, they may not meet your needs.
The walthers line especially had kits for many different prototypes of coaches and pullmans. Many of the heavy weight name trains could be modeled. they also had a big variety of head end equipment to fill out consistss, and solariums and observation cars.
