Any experience with Sena devices and ear plugs?
Can't speak for Sena, but I have a Spirit bluetooth helmet-kit, principle is basically the same. I currently use nonoise earplugs and can hear music very well, wind noise is vastly reduced but I can still hear road sounds, like hooters, engines etc. I don't take phone calls when riding so can't speak for that. So I suggest you get a cheapie foam pair from Builders to try out and if you don't like it then you haven't wasted too much money.
To be honest though they do not live up to the hype you find in their marketing material. I used to use cheapo foam earplugs from Builders and those were lovely. No wind noise to speak of and could hear music just fine. I just hated having to keep re[lacing them (yes they are cheap but you have to make sure you always have spare ones around).
The first ride using the nonoise earplugs I really thought "damn I wasted my money," the wind noise was just too audible. But after a week of daily use I got used to it, each persons ear canal is shaped differently and I just had to figure out the best way to fit them in mine. Now I find it hard to ride without the nonoise earplugs, I can concentrate so much more with them in.