I fly the C172 RG quite regularly (makes a fair bit of noise!). Our a/c are equipped peltor headsets. Compared to a sennheiser headset (used in SAS 737 due to noisy environment), I prefer the peltor. Peltor headsets are roomy and don't press on the ears too much. The sennheiser headsets I've tried press too much on the ears and although they block sound quite well, they tend to become painful after 30 min... . . But the best thing i find is that they're really rugged and can take a fair bit of abuse (club flying!).
cheers/lns