I wanted a pretty sturdy stand with enough space to store all of the equipment out of sight. But I have never been a fan of the cheaper vaneer'ed particle board construction that seems to be the norm anymore. I figured that I would have to build what I was looking for.
So I searched and read up about intermediate_noob and BiscuitSlayer's 75G stand builds. I wanted the same stability and strength those seemed to offer. I ended up adding additional top space between the tank and the wall to cleanly run the inlet and outlet plumbing through. This put the top deck right at 48" wide and 24" deep. I wanted to avoid as much viable tubes and cords as possible and am planning to use those desktop cord pass throughs to run past the top deck.
A trip to the hardware store, borrowed miter saw, and a day later I had a stand frame.
I used a 2x6 top frame, 2x4 bottom frame, 2x4 legs and floaters, coated wood screws, and quick dry gorilla glue to firm up the joints.
I'll skin this in 1/4" and 1/2" oak plywood, oak trim, stained, and polyurethane coated.
The 2x4 uprights between the upper and lower frames are 18" which gives around 26 1/2" height inside the stand. This is just enough to clear the reactor length I was targeting as well as the CO2 tank I had picked up. The 10lb CO2 tank measured 22" from base to top of the tank valve. The Sumo premium regulator I'm using adds some extra height to the tank putting things at 23 1/2". The inside of the stand at to be at least this tall......plus some extra wiggle room.
The stand frame head-on.
The stand frame from the side.