I went into my local Honda store last year with the intentions of finding a 3/4 helmet for use with my Scala Rider Q2s. I walked up to a Fulmer, tried it on, and bought it and haven't looked back. $54 out the door for a comfortable helmet that works for me.
The sizes run small. I believe I have a Medium and I'm an XL in HJCs.
I have both mounted on the left side of my helmet. The Sena unit is mounted closer to the face opening and Honda’s headset is right behind it. I have the Sena earpieces set in the helmet ear reliefs and I cut out reliefs in the styrofoam and set the Honda earpieces just above the Sena earpieces. It may sound funky but it works really well and it gives me many connection options.