I am considering purchasing some hex dumbbells, 5lbs through 50lbs. I have plenty of plates and dumbbells for weights higher then that as I have heard that for anything over 50lbs the hex aren't the best way to go.

I just hate having to load and unload my dumbbells all the time for the lower weights, especially when I am trying to "run the rack". Any opinions on the hex dumbbells would be appreciated.