Well, bob2, et al:
Lionel's Berkshire goes for $1449.95. 3rd Rail's Erie Berk is $1499.95, and limited run, available in 2- or 3-rail. Round boiler and all that good stuff. Sadly (but not to me) no whistle steam and that sort of jazz. Plus- if something goes wrong 3rd Rail takes care of it pronto. If I were in the market there would be no choice.
I have no idea why the above is bold-face.