I have 3 of the 2-6-0's, I bought the first one and it ran so well that I bought 2 more and I'm thinking about buying a 4th. The 2-6-0 is a great running locomotive and hasn't any problems with the 9 inch curves. I have a couple of the MDC/Roundhouse/Athearn 2-6-0's (all the same locomotive), they are good runners but don't lend themselves very well to lubrication and maintenance. As mentioned before a good source of information is the N-Scale Encyclopedia at
http://www.spookshow.net/locos.html
http://www.spookshow.net/locos.html