Greg,
The Bose are what we use in the King Air. Sitting right between the PT-6s and the 4 bladed props would be enough to kill anyone's hearing, but the Boses are the cat's meow.
On ours, we use the battery pack version, versus the plug in power model. They're nice, and I've even been able to "borrow" my work headset on a trip in the 150/150. Very nice. A cool grand is a lot of money, though. Divvied up into bite sized pieces helps a bunch. May go that route. Hope you enjoy them.
