Ok, I have been reading these threads and they have just made me more confused. So I will start with this. I used to have an old lionel train set when I was a kid. That is long gone now, but I want to get back into the hobby, unfortunatly I don't know where to start, and I don't want to spend a lot of money. Of course I know that that will be impossible so... Having said that, first is the scale. It looks like everything seems to be HO and O. My wife likes the Polar Express O train set, but that is selling close to $500 on ebay and all stores seem to be sold out. So what are the main differences between the scales (other than size)? Is one size bigger or smaller or cheaper or easier to find? Next is the controller. DCC DCS TMCC... same questions as above, which is better and why. I don't like to mess around with electronics too much, I would like a set that I can open the box and have it run. I would like it to have sounds and a main goal of mine is to have this thing running all around the house. Is this possible? Is there a limit to the amount of track that I can use? Is there a way to boost the power? Well, if anyone has this kind of thing running in their house please let me know how you did it and about how much you think it would cost. I should get e-mailed when this thread is updated but if not - firstname.lastname@example.org If you know of a thread that addresses this issue please let me know. thank you!