not disagreeing with dess, and other people's lifting needs might be different than mine, but fwiw I bought a set of PowerBlock dumbells that I've used for six years and been very happy with, they go from 5lbs to 80lbs, it takes ten seconds to change the weights, and they seemed pretty reasonably priced at the time. For my needs, having such a small footprint in my home gym for DBs was worth the minor shortcomings. (The shortcomings would be: slight clunkiness, slight awkwardness, slightly more time to change weights.) It's probably worth going into a lifting supply store to at least check them out, you'll know in five minutes of tinkering around whether they would work for you.