Lot to consider here. If you want to go with a wired headset/mic, check Whitehorse Gear. I have bought two IMC sets for about $35 each. These worked ok, the primary cable plugs right into the Harley socket without any adapters. I don;'t like the intercom units which require a comm box clipped some where on you or your bike.
If you want to go "wireless", the brands mentioned would work fine. Keep in mind there are different models. One model is just for intercom, blue tooth to your phone, Ipad etc. The other model does all that, plus allows wireless comm to other riders who have the same comm gear up to 1/4 mile away.
If you get a set that requires earphones in your helmet, the best thing would be to pull your cheek pads and cut some material out to mount the head phone/speaker properly. Hope this helps.
03 Ultra Classic Electra Glide, stock, and keeping it that way................I hope