Tore down my daughters 4x8 O since I have to agre with her its too small and kind of boring. I don't think I can work with N at my age but between the 2 of us I'm pretty sure we can work with HO and I don't have much rolling stock but I did keep most of the buildings from years ago. Anyway if you're using atlas true track would you do it again. I see it's not exactly inexpensive.
Thanks
joe