I see your point, especially about the integrated chaps.
I think just about the noisiest aeroplane I've spent a lot of time in was the old CFM Shadow that I did my first PPL in, but both Lynx and Communica do superb passive headsets specifically designed for microlights. Standard GA headsets just don't cut the mustard in that sort of environment, and I wouldn't use them.
Just re-inforcing an earlier point, a really quiet and comfortable headset does a lot for your ability to concentrate whilst learning, and arguably pays for itself in that regard. The Bose I used for my CPL almost certainly did (especially as I only borrowed it!).
G