Thanks guys... I just received my Team Wendy EXFIL Ballistic (we were using bumps before) and it's flat-out the best helmet -- bump, ballistic, or otherwise -- I've ever worn. It's like wearing air.
I'll probably get some UV-5B's instead of the "R" version that we already have, but since we have them and I assume the same PTT rig will work with both I don't mind spending a few bucks to get the PERFECT cable / PTT rig for the job. If I had to, I'd get adapters, but the custom all-in-one solution just seems more elegant.
Also, and I know this is personal preference, after having Sordin's and ComTac III's, the ComTac IV is in another universe for a variety of reasons. My ears sweat profusely when covered by normal ear-pro, and I always hate having to take them off the ear to hear unaided. The IV's solve both problems, and I don't get a headache or ear fatigue with them. In fact, I almost forget I'm wearing them.