I'm happy with my fairly cheap LS2 silver modular helmet. I just leave the air vents on the top open all the time. I have an Avantree bluetooth headset attaches neatly to the LHS, to receive talkback directions from google maps, via my phone mounted on the handlebars, On the RHS of the helmet I have a Sena (type) tube camera. The helmet is ok, slightly noisy,but its not uncomfortable. The only down side is I am a spectacle wearer, and the helmet has no provision for the spectacle arms.
2017 BMW G310R
2019 Suzuki DL Vstrom 650