I have a 190 and use it regularly with my Hasselblad. Longest lens is 250. I have a 486RC2 head. The legs are fine and I don't find the weight an issue, the only thing is that sometimes I wish I had the 055 purely for the extra height. One thing, I never really extend the central column, it doesn't seem to feel very solid with the Hasselblad on, but maybe I am wrong.
The head is also fine but that probably has more to do with not having to rotate the Hasselblad too much as the square format minimises that. If I was to spend any money I'd get a better ball first then look at the 055 legs.
But with all that said, I am very happy actually with the 190+486 combo for my Hasselblad.