Right now, I am working with SCARM. The main factor for me that took me away from RR-Track was the licensing and pricing. Getting the right mix of up to date libraries was a pain. With SCARM, I haven't had to buy libraries yet and the price for licensing the software is reasonable. Also with SCARM, the author seems responsive to fixing issues where that wasn't my experience with RR-Track.
I downloaded AnyRail to try out because some of the layouts posted here were in that format. I haven't had time to try putting my own layout in there.
If you are just going to stick with FasTrack, my suggestion is to download the free trials for a couple of different programs and then use the one easiest for you. If you are going to use several different kinds of track and potentially other scales then you will want to pay attention to what libraries are available for those types of track and scales.
