I think you will be very pleased. My friend Mike Walter is a big 2 Rail Guy and has a great collection of high end motive power and he praised it. One small thing I really like is the way the headlight actually lights the track ahead in night operation.
Oops I just reread your post and realized you bought the Sunset, which would be HO. I have one but my HO layout is out of service. Still a very nice engine.