Hi, I'm looking for a good running locomotive that I can just use without worry of it derailing/etc. Pretty much all the locomotives I have are athearn blue box, with some Proto 2000, a couple Kato's, and some Bachmann. I'm looking for a four axle loco, that is quiet/smooth etc and can pull a couple cars. I don't need it to be very powerful. My preferred road name is BN, but GN, Northern Pacific, and Milwaukee Road are all fine. Time period isn't of concern either as I just run what I have, not too picky . Thanks for the help.