I've got an AGV Stealth now, and I do find it a good helmet, but that said, I'm sure I can get much better. It's quite noisy, but fits well over all.
Shame the thing just rusts like a *****. The front & side vents have all rusted on mine, I've cleaned them up as much as I can and applied ACF50, but I'd have expected them not to rust in the first place for the price I paid.
Had to replace the clear visor twice for it as it scratched extremely easily, the one I got now seems much better. Weird thing is the one that came on it, and the replacement I got from the store didn't have AGV Stamp on it, the one I bought online did, so not sure what went on there heh.