i`m just a relative beginner, and there are people on here with way more experience, but i`ve gone for dumbells, as they won`t cave in the floor of my home with their weight.
BUT, dumbells - or so i`ve heard - are not practicable the more weight you want, since separately they`re almost impossible to lift the heavier they get.
That`s what i`ve heard.
I use a barbell for deadlifts/squats and for their versatility, and the fact that i`m a beginner, the safety and control aspect, i use dumbells for the rest.
Undoubtedly there are people on here with way more experience who can offer different points, but i just thogh i`d chip in...