Thank you for responses.  I think I have some LaBelle 108 in one of my boxes, it definitely is worth giving it a try.

I have Bachmann 44-tonner, doodlebug and EZ-Command DCC. all work fine.  Just added a Bachmann FT-A w/ DCC pre-installed and while it runs fine and quietly at moderate speed, at low speed it screeches and chatters.  Is this the nature of this particular model series, or is it a problem to this particular model and thus due for repair or replacement?  It's a week old, purchased new via mail order.