I will finally be getting a switching layout together and need some help choosing rolling stock. The layout will be done with Atlas code 55. It will be set in the current period on a small branchline here in Maine. I will have the track laid in the next few weeks and would like to be able to operate on it while I'm getting structure kits together, etc. Can any n-scalers recommend product lines or specific car kits that will have wheelsets that are compatible with Atlas code 55?