If you had to pick one It should be MAME64. I think most people would choose this because it includes home consoles, handheld, etc. and also most use a front-end with MAME64.
I can't even create a new MAME ini in command line. Just crashes. Won't launch a game in command line or even open when double clicking on the MAME exe to try and get to the built in ui. You might have to create a new MAME but just wait til next week when the new release is out. I appreciate these builds.