Just bought a 6-pack of bethgons from Walthers Gold Line. I have to admit that they are pretty darn nice (especially for the price).
AND I learned something new…all of the couplers in the bethgon packs (except two) are not the prototypical metal knuckle couplers. Only the couplers at the ends are metal with air hoses. This is because unit trains are usually never “broken”. I felt like an idiot at the LHS yesterday when I asked the guy where the real couplers were and if he would cut me a discount to replace them. He just looked at me and proceeded to edumucate me!