I used Bachmann N scale in my Mesozoic Park dinosaur layout. I used the 9 3/4" radius track. As Dan said, the Kato engines are noted for being some of the best running in that gauge, but I happened to have a Bachmann F7 on hand. I added some styrene seats to the gondolas for the O scale kids. As has also been noted, all N scale runs on a DC power pack.
Jim