If I'm going to do it, I'll have to do it right - placing catenary posts along the tracks as well, but I think that's a detail that will work well for me in the long run.
The Modemo stuff seems to run well and is able to pull off the slow movements I'd like. The only downside is not being able to run it locally before buying it to see if I really like it or not, but I think it's still worth the risk from what I've seen online.
I'm going to do some more looking, but I think this will be ordered by the end of the month. :)