I've owned almost all the helmets listed (and a couple others)* so here's my feedback on helmets:
-My very 1st helmet was a cheap PASGT helmet I bought at Andy & Bax. Fit well, but hot as the dickens in the summer and not really adjustable (except for the basic chin strap).
-My 2nd helmet was a replica IBH. Pads sucked, straps sucked, but the high ear cuts allowed me to wear my Comtac II's with no problem.
-My3rd helmet was a replica MICH2000. Pads & straps were a bit better but required a bit of adjustment when I'm wearing my headset (and again if I'm not). I have a Comtac II which was designed to fit better under helmets, but as I said this was a replica (which was bigger than a real MICH) so YMMV.
-My 4th helmet is a modified ProTec-like helmet I ordered from
these guys. My model apparently is discontinued but it looks like it was replaced with the A-Bravo Half Shell w/ Wilcox Shroud (without the shroud). Fits really well and adjustable; liked it so much I use it as my actual bike helmet.
-My 5th helmet is a replica MICH2001. Like the MICH2000 the pads & straps are okay, but since it's a knockoff it's a little small & not really in spec. At least it was a high cut so my Comac's fit. With both MICH's I'd recommend getting better straps & pads.
-My latest helmet is a replica Ops-Core FAST PJ helmet. I did a little
review on it and of all the helmets I've had I loved how it fit right out of the box. The Occ-Dial system kept is securely on my head & my Comtac's easily fit under it.
TL;DR If your impression is going to include that headset in your OP I'm going to recommend an Ops-Core style helmet or a MICH2001 with an Oregon Aero kit.
*Except the M1 pot 'cause I'm not hipster enough like VogonFord... Yet.
"It's nothing to worry about. It's just a fire on my head."