Or try a couple of hundred for a perfectly servicable standard headset. If the noise bothers you, stick some earplugs (foam things) in your ears, and turn up the volume on the intercom.
Confess I'm tempted by the clarity aloft and the like - mainly because I suspect it would be liberating to remove the weight from one's head whilst aerobatting, but to be honest, my 3 year old DC's are as good as new, so I have no excuse..