I hear ACE makes the best MICH helmet, and lucky for you their USAF STS figure will be in soon, and dealers like vikingplayground may be breaking it up so you can snag one.
I don't know about sizing, but I also hear that TS ones are pretty good for bigger noggins.
On your existing ones, did taking out the padding/suspension help with the fit?
Hmm, if you don't mind a little surgery, I think if you cut the strap holders off of the pads and glue them in, it should work in a pinch, might look a little funky on the inside, but you could always shave them down slimmer and glue in thin foam padding instead.
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