I have 2 K4s, an L1s, and a B6sb. I love them all! Back in the day I had TrainAmerica put TMCC, EOB, and Railsounds into the first three and TMCC into the B6sb. Two years ago I replaced the B6sb and had All Aboard Trains put the Electric Railroad componentry into it (sound, too). It's even more impressive.
Here's one of the K4s (post war pilot).
Here's the L1s.
Another shot of the Mikado rounding the curve.
I wish Williams had made a T-1 or a J or a Decapod as a Crown Edition.
George