I bought a pair of Michael Green Justaracks (deluxe) many years ago for about $450 each. The MDF shelves are two inches thick, and easy to adjust- something I've had to do several times as needed for different components.
It's not very pretty to look at (all black), but is extremely solid, even if you want a turntable. The thing is, except for Mapleshade (which is very expensive for two racks of four shelves, each), no one makes anything like this anymore. I'm not
deriding high-end rack systems, but I certainly got a good return on my investment, and spent the money I saved on a preamp or a CD player.