I've seen one person's system set up on two Target VW-2 wall mounts. His were lined up horizontally (side by side, but you could also line them up either vertically). Plus you can replace the stock MDF shelves with anything of your liking, i.e. maple butcherblock or granite.
I've got a 60 lb slab of granite with a 48 lb turntable on the top shelf of the VW-2, and a ARC SP-8 on the bottom shelf. When I first installed it (into the studs in the wall), I kept a carpenter's level on the shelf, just to make sure I would notice any subtle sagging if it occurred. It's been about a year now, and it hasn't moved.
Anyway, that's a thought.
I've got a 60 lb slab of granite with a 48 lb turntable on the top shelf of the VW-2, and a ARC SP-8 on the bottom shelf. When I first installed it (into the studs in the wall), I kept a carpenter's level on the shelf, just to make sure I would notice any subtle sagging if it occurred. It's been about a year now, and it hasn't moved.
Anyway, that's a thought.