I am in the process of choosing flex track right now. I chose Fox Valley Models #5 switch for all turnouts. I am going the scale route, so my choices are American Models, still some SHS freight cars and mth has plenty to choose from. I have decided to buy a legacy berkshire, I plan to put scale wheels on the tender, forward and trailing trucks. I think I found a way to "scale" the drivers, I need to ask a question to see if it's possible. I am only going to run DCC, keep trains short, choose five different diesels and five different steam engines. Layout size is 5x16, I keep asking questions on here and the return information is the best I could ever ask for.