It doesn't seem like there are a ton of options for vertical racks like this that can hold up to 50 pound dumbbell sets, so I was very happy to find Synergy. The build quality is extremely high, especially the powder coat which looks fantastic. With this type of rack you do have to be a little careful when putting dumbbells back or else you can get a little pinch, but it's well worth it if you need to conserve space. The footprint is just slightly over 2 feet square, which is tiny compared to a lower horizontal set of shelves.
The price is a bit higher than other options, but they are made in the US, have tons of color options, and you can also attach weight pegs and anything else to the upright in the middle. They have also now come out with a way to mount the vertical racks to walls or uprights which would save even more space. Highly recommend checking them out if you want a nicer storage option than the typical shelves.
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Build Quality