I have a Bachmann GG1 with SoundValue. When the sound is turned off the only sound discernable are the metal wheels on the rails. Drive is very quiet and smooth. The Bachmann GG1 got top ratings of all GG1's that I have read.
I have never had a problem with any of my Bachmann engines - Bachmann is high quality as long as you are not requiring all sounds (like coupler crash and wheels squealing). The detail is good - not quite as much as following locos.
I also have Intermountain Tsunami diesels and a BLI PRR M1b Paragon 3 steam engine - the latter have more sounds but cost another $100 approximately.
Purchased two NS ES44AC units straight DC. Both in the Rivet Counter variation. They are great runners and the detail is over the top. Care must be used when handling which I do rarely. In my opinion they are comparable to my fleet of Kato SD80mac and SD40-2 units in performance. Very pleased with customer service when ordering direct from Scale Trains. The young lady I spoke with was beyond nice to deal with. I will be ordering more units in the future.
The OP has heard plenty of opinions at this point, and people are getting snippy for no good reason. Therefore, this thread is being locked.
--Steven Otte, Model Railroader senior associate editorsotte@kalmbach.com