ALL HD helmets are made by somebody else, and not all of them are made by the same company. To my knowledge, none of them are made by Shoei. I have not thoroughly researched this, but as a general rule, modular full face helmets do not pass SNELL standards because of the modular feature, but there may be some out there that do now. However, if you wear glasses, the tradeoff is worth it to me.
The HD Boom Headsets, which will come with your bike, will clamp to most helmets with a STRAIGHT lower lip on the bottom side of the helmet. They will NOT clamp to a helmet design like Nolan, which has a curved bottom. I can't answer your question about the Bluetooth stuff, as I do not want to talk on the phone while riding. One thing I do is pair the phone with the GPS so that I can tell when a call comes in, and then decide if it's important enough for me to pull over and talk to someone, which is rarely the case. But, I'm not a big talker on the phone, and I don't have a business, etc. If my Sister calls (which is rare), then I'll probably pull over and call because something is up if she calls me. Everybody else can leave a voice mail.