Since my main use will be on the C172, how much of any advantage will
the 20XL be over the QFRs? What would be the main difference btw the
20XLs, and anyway to tell if they are of the newer type?

I'm just wondering if the 20XL are worth the $$ over the QFRs? Are gel
seals available for the QFRs?

Thanks for the help!
Thomas Borchert wrote:

AFAIK, the current 20XLc has been redesigned to be sturdier than the
older 25XLs Jay is talking about, too. So I'd go for those. The QFRs
are Peltor style, with a wire frame. Their ANR is not nearly as
effective as the 20XLc. Also, if you decide to go for the QFRs, don't
get the Lightspeed branded ones, but rather the much cheaper, but
completely similar models branded to a pilot shop (Marv Golden, Avshop
et cetera). The only difference is a polished earcup.

--
Thomas Borchert (EDDH)