Why the double post?
Lunacade was the ---steaming pile of meadow muffin---, that's the one that inspired me to build bartops.
Anyway, if I were you, ill go with an i5 i7 PC with a decent video card and a crt monitor. Nowdays you can also rgb mod some crt TVs, and the look nice as most TVs don't have burned in. My choice is always hyperspin, looks nice and works just as with a p4 old PC, but I've seen other Front ends, that look good. Also a pi4 with rgbpi looks and works nice. So there are many choices. There has been a recently way to use themister as a video card with groovymame, on that one I'm not so sure, as the danm mister still to expensive.