As my fellow folically challenged buddy said, do what suits you the best.
I own two David Clarkes and a Gentex helmet. The DCs worked well in an executive/corporate environment, but otherwise even a heavy SPH-4 Gentex is more comfortable on a long day flying a utility helicopter. The helmet will distribute the load over a larger surface as the headset will usually have a pressure point on the top of your head and hard on the ears.
Unless you are going to work for Helijet or their new competition, I would suggest a newer lightweight Gentex or the Peltor series headset. Very comfortable. If you win the lotto, try out the new Bose ANR headset, I think that will be a real winner, Bladestrike and I will be sporting a set soon.
BTW, Bladestrike is not actually folically challenged, he just chooses the look.
I, on the other hand, can't stop the genetics I was born with.
RH