Hm, is this the Pacific Flyer set in question https://www.amazon.com/Bachmann-Trains-Pacific-Flyer-Ready/dp/B001RG0LLE/

The Thoroughbred is cheaper but I think it's too plain looking : https://www.amazon.com/Bachmann-Trains-Thoroughbred-Ready-Scale/dp/B001RG7LDU/

And to add track I just search for bachman ez fit track? https://www.amazon.com/Bachmann-Trains-Snap-Fit-Radius-Curved/dp/B0006KQH6A/ if I want to make sure the circle is big enough for our tree.. ?