I'm looking at the Contrail Lion Chief rectifier at the moment, hoping to make a purchase soon. Electric locos have always been a favorite of mine, over steam and diesel. I like seeing them run under live catenary. When I finally get started on my layout, I will build a catenary system similar to what I had many, many years ago.
There are or should I say, were a multitude of electric locos in the real world. There still are in Europe. A lot of them have been reproduced in O scale, three rail. I'd like to see more in semi-scale however. Some of the offerings from MTH, that I know of, are too pricey for my wallet.