Hi. I've been researching this for a few weeks but still haven't figured it out. I understand that the different scales are to a particular railroad, but my problem is I don't know anything about the different railroads. All I know is I want the biggest train I can afford. Which is roughly under $1000. None of the manufacturers put dimensions on their products, only scale, which depends on what it's trying to model. I tend to want a steam engine so I think I've figured out that the Bachmann Spectrum 1:20.3 4-4-0 or 2-6-0 is what I want. Is this about the largest I can get without scratchbuilding? I'm more concerned with the height and length than width. I don't care about scale for my purposes at this point (that may come later) just the largest I can get for display. Thanks for any advice.