I just got the 6-37947 from Lionel. I like the retro look. I was really surprised at the size of the PH180 brick. It's really big and heavy. Having owned it for just a few days, not sure I'm qualified to comment further. Since I run LC/LC+ locomotives, I will say this will be an outstanding speed "limiter" when the grandsons grab the controls.
This replaced my 54 watt wall-wart. I expect this to provide enough power for any empire I can build.