The in ear ones are WAY overpriced from how they feel and I wasn't all
that impressed with the lightspeed mach 1. The clarity aloft felt a
bit more substantial, but not by much.

The Bose Aviation X on the other side.....

I tried all three of the in the ear headsets at Osh. The lightspeed was
by far the worst of the bunch. The Clarity aloft was impressive, but I
was even more impressed by some "home-made" in the ear headsets around
the corner and behind the lightspeed booth. This is a guy who is an
audioligist making these things in his basement with real hearing aid
quality speakers. A good friend of mine bought a pair, they are about
60% of the cost of the lightspeeds. His site is:
http://www.quiettechnologies.com/ (cheaper too)

I've had a set of Quiet Technologies for a couple of years. They aren't
as quiet as ANR but are much better than a regular headset without ANR.
The foam also got distorted and didn't seal well in high heat. Once over
110ºF, they didn't fit very well or for very long.

Like everything in aviation, they are a compromise. They are light
weight and comfortable and reasonably quiet, though.
---
Ken Reed
http://www.dentalzzz.com/mooney.htm