I like the 4x4 Lack cubbieholes personally. That'll be what I go for when I start setting up my retros.
Years ago I used an old style dresser drawer that I modified to accept my 8/16 bit era consoles. I worked ok and kept my consoles out of prying eyes. I now have something similar to the 2x4 cubes there but one made specifically as an entertainment system. It's OK but cable management is ass.
the "dedicated" gaming stands suck. They sucked when they were around twenty years and they still suck now. They're like KMart furniture. It's good for a couple of years but if they haven't fallen apart after that you'll be looking for something more suitable anyways.
if those three are your only choices go with the cubicles and install a back panel and drill out some holes for cable management.