Hi Dan. I would agree with some of the above comments. Avoid Mamod / MMS direct drive type locos if you have gradients. On a level line they can run nicely when r/c is fitted, which was from memory not too hard to do myself. Mamod geared locos do work OK on gentle gradients. Mamod are cutting back on their range at the moment as they are moving factory premises shortly I think. Regner geared locos handle gradients well, and are available with R/C, mine runs like a sewing machine (most of the time). Going up in cost Accucraft and Roundhouse locos are very nice, and with R/C should cope with gradients, but will need driving more than a geared loco. Marc Horovitz of Sidestreet Bannerworks is good if you are near him and would probably be able to sort you out, (other sellers are available, as they say). He is the only person in USA, (I am in UK), that I have any dealings with, as one of my locos came to me via him. I certainly enjoy running live steam locos, and have built some as well. They will need a bit more preparing, running, and cleaning, than a track powered loco, but in my opinion much more fun. I hope that helps. Happy to answer any further question you may have, about steam in general, or specific locos if/when you get to that stage. Do feel free to PM me if you wish. David (rdfmts2).