I used Bose in the King Air and C421 I was flying...and holy crap...can you say "worlds apart?!" I found I was less fatigued at the end of the day wearing the bose. YES, it is initially an arm and a leg to buy them, but as others have said: "Your body will thank you at the end of a 14 hr day."
Also, just as Fosters was saying, if you are flying jet equipment, try the Telex 850's. They are ANR headsets...and work great. BUT, they don't require batteries...which is a plus.
All in all, whoever said the get em...I agree with
Lax