Hi everyone, I have been trying to figure out what O scale set to get for a while now. It will primarily be for around the tree, but maybe more at a later time. I was pretty well sold on The Polar Express, but my hobby shop has a Union Pacific Fast Freight for 40.00 more, and I was wondering if the upgraded Berkshire (with momentum flywheel, and I believe more sounds?) was worth the extra money? Are these features that big of a deal? Any others that I am not aware of? Thanks in advance.