Lots of good info and opinions here. What I am after is a decent looking scale or near scale RS-3 with good reliability.. Some of the Lionel diesels that I have seen have a plastic frame. That doesn't represent quality to me. Also too many complaints about Weaver chain drives and gears breaking. That's a deal breaker for me because at the present time Weaver cannot supply spare parts and isn't building any diesels at all. You cannot get spare parts for K-Line so Williams might be the best choice.