Gallet helo helmets are probably the best, but they are godawful expensive. There are others: I nabbed a Gentex SPH-5 off of ebay for $100 about ten years ago. There are several variants with either one or two visors (mine has one), holes for NVG mounts and either single-plug helicopter cord, dual aircraft cord or military. I really like having that visor so I can wear my normal glasses under it and still have an excellent sun shade. The visors are replacable; there are gradient, gray and amber visor lenses for low contrast conditions.
If you go that route, make sure it has either helo or civilian headsets in it or you will have to replace that to use it in your cub. I believe that the impedance is different in the military application.
Another model is the HGU-56. Mine has the helo cord, but an adapter will easily fix that. There are different sizes, of course, so if you're buying on-line, you need to be sure you can return it if it doesn't fit.
These are heavier than the Dave Clark helmets, but I figure that a cub flies more in that type of environment than anything else. I've worn mine for up to five hours. In the summer, that gets fairly warm, but in winter it's pretty nice. Mine has a TPL liner, which helps a lot. It's not going to be as comfortable as wearling a baseball cap and headphones, but if something bad happens, you only need it once. I wouldn't consider riding a bike without a helmet, but of course, most of those are much faster than my -12.