My favorite is Scale Reproductions, Inc. in the McMahan Center at Hike's Point. It's a classic, fully-stocked, broad-based hobby shop. It has a comprehensive RC department. A big railroad department (unfortunately it's about 95% HO) and the best plastic model department that I've seen in a generation. I frequent them as much as possible to keep them going. They plastic model department is so enticing that I'm tempted to start building again. But I can't. I have a railroad to build.
For trains, I go to Roundhouse Trains which is the one you mentioned in the Brownsboro Center at the Watterson/US42 junction. Roundhouse changed owners and tripled in size when they got the space that used to be held by another business. It's a terrific train store that's also a licensed repair center. They're about 70% Lionel, and have lots of used and new stuff. For my train purchases I usually go there. Again... I want to keep both of them in business. The L&N train store that was way down on Frankfort Ave, closed when the owner retired. Roundhouse took up much of the slack created when that happened. When Kevin took ownership, they lengthened their hours so they're now open like a normal retail operation. Before, they were open every other day.
There's a smaller RC specialty shop on Shelbyville just East of Hurstbourne and there's another full-range (although smaller) shop in a shopping center out Shelbyville before you get to the Gene Snyder. There may be others, but I don't know them.
