No. I'd stay away from the old old Athearn from 50's and 60's. The technology between those and the next leap in running quality was the use of fly wheels, universal joints, motors and worm gears. This lead to Athearn being the leader in model railroad engines during the 70's and mid to late 80's. Thier drives were about the best factory drives out there. Then the boom in modeling hit and other companies started producing better "upgrade' parts for Athearn. This then lead to other manufactureres getting into the game where better shell tooling and drives lead to more prototypicle models and smoother drive mechanisms. This lead to what is available today. The leap in technology in the last 20 years has lead to some pretty nice out of the box running engines and cars. More detail and better proportioned.
The drives of the 60's just don't compare to the 70's Athearn drives. I have some and they still work after 30 years!
Compare that to today's skew wound motors, quiet drives and electronics and you can see where the 'base' of todays drives comes from. An improvement over the pioneering efforts of Irv Athearn and his company.
That said, I have to admit that Life Like Proto, Atlas and BLI are the leaders in todays market. Athearn has also stepped up to the plate and put out the Genisis line of better quality and detailed models. Most of my engines are LL, Atlas , BLI and Bachmann Spectrum. I do have a couple of Atherarn Genisis locos, but they just don't produce engines I needed and use. I'm a 1st generation Alco guy. Atlas, LL and Bachamann produced the models I was after. This is determined because the railroad I model, the New Haven of the 1950's, was a loyal Alco user. Hence the standard locomotives for my railroad are mostly Alcos with a smattering of Fairbanks-Morse and EMD.
I do have some 'other' engines that will never see the DCC layout I'm building today, but some of my well detailed and painted models I made will sure be there including the older Athearn driven models. I didn't take the time to super detail these not to run them also.
Bill Shanaman