I tried out my new 50D's yesterday, and I can confirm that this is a great product. I fly Piper Warriors at the mo and although they arnt the loudest aircraft in the world I still noticed a real difference compaired to any other headset i have used in them before. As pointed out by someone above they are very bulky to look at but when you have them on they dont feel bulky, they are surprisingly light and very comfy. I havent tried the ipod jack yet, but might plug it in on a long X counrty someday. Highly recommend and for anyone interested, I got them for $1100 AUD in Australia.
Cheers X