I use the HGU56 with CEP (ear-plugs with audio) - US Army type. They work great and the CEP is inexpensive. I tried ANR before, never could get it to work well with any sort of window open or doors off config. - also, the battery changing was bothersome.
The helmet looks large - wide, but is one of the lowest profile helmets (height) and lightest on the market. The visor problem with dirt is a bit of a pain - I make sure the slides are clean and lubricate them with non-dust attracting spray - not sure the name brand, will look it up. Since using that,I've had no more trouble. With CEP, breaking the earcup seal with sunglasses etc is not that much of a deal.