I have the David Clark DC Pro (active noise canceling) headset. I like it. The DC Pro was cheap (about 600 bucks), comfortable, light. I haven't used the headset yet in the C172, so I don't know how well it works in a GA environment. I will try post when I do get the chance to use the DCPro in anything a high noise, General Aviation environment. The DC Pro is also pretty compact, which is great. The battery life is decent..I'd estimate about 50 hours on two double As in a jet cockpit environment.
Cheers! Ask questions or PM if you'd like.