Vinton Wights narrow gauge audio was good. He has some unique stuff that was recorded at locations that no one else seemed to get (such as east of Durango). One memorable cut was 488 and 491 headed east just uphill from the Carbon Jct. crossing. 488 and 491 bog down to about 6-8mph and slog thier way past up the hill with nary a 1/4 slip. It is cool.
He did a record of UP 9000's which was really cool. There is one runby with a 9000 and a UP 2-10-2 which is the most caotic mess of locmotive exhaust I've ever heard.