aluminum is harder to repair than steel but I wouldnt say that they are weaker. I prefer aluminum but the cost is what keeps me from getting some.
And I wouldnt say that H1s are necessarily strong, so no I dont think the weight is worth their strength. the outer rings are easily bent, that is why so many companys sell rim stiffeners. I had a set of H1s and while they are awesome as far as beadlocks go they were heavy, 70lbs a piece for the wheel and mag runflat. I would search for some of the threads on H1s before you think about getting them.