I have a very few modern US Locos, which are from three different companies, Bachmann, Walthers, both EMD SD70AC and Mainline Broadway, GE ES44AC. Bachmann was from Bristol based Modelmania, at the Calne Model railway show. Both UPs were purchased from Model Junction in Slough, but I'm sure other similar outlets would be just as people have recommended them. The Bachmann is the Green Heritage and comes with lights, and sound fitted, as do the two UP ones. The Broadway also has smoke, which is adjusted to match the throttle.
In the pictures, the Walthers is in the centre.
The next is from a more normal viewing distance.
This one gives a more detailed view of what you get from each one.
All quite crisp mouldings, Bachman, good, Walthers, better and Broadway, best.
Added detail, Walthers least, Bachmann, better and Broadway, best, by a long way.
Sound, Bachmann basic, Walthers, better and Broadway best {Works equally with DCC or DC, with added "Rolling Thunder", adding ground thundering, through a big speaker, not included, under the layout}.
All run well, but again the Broadway has just that bit smoother and creeps slower.
Prices, Bachmann, least, Walthers, a small margin more and Broadway, most, but not an Antiques Show margin...
Hope that might be of some assistance.
Regards to all
Julian
In the pictures, the Walthers is in the centre.

The next is from a more normal viewing distance.

This one gives a more detailed view of what you get from each one.

All quite crisp mouldings, Bachman, good, Walthers, better and Broadway, best.
Added detail, Walthers least, Bachmann, better and Broadway, best, by a long way.
Sound, Bachmann basic, Walthers, better and Broadway best {Works equally with DCC or DC, with added "Rolling Thunder", adding ground thundering, through a big speaker, not included, under the layout}.
All run well, but again the Broadway has just that bit smoother and creeps slower.
Prices, Bachmann, least, Walthers, a small margin more and Broadway, most, but not an Antiques Show margin...
Hope that might be of some assistance.
Regards to all
Julian