My advice would be to see if you can try the different brands in your plane. I was going to get the BOSE before I went to Airventure and while there I decided I would try all the different types. For me the Lightspeed was the better sounding headset. I actually got the 20-3G since it sounded as good/better than the BOSE and was less than half the price. I have since also purchased a Zulu. Everyone's ears are different so not all headsets will sound the same for each individual.
WW