I fly the
CRJ200, CRJ700, and CRJ900. I see a lot of different headsets being used. I use the Sennheiser HMEC 25-KA. It has ANR (two AA batteries), it is compact, and very comfortable. The CRJ200 is by far the noisiest airplane of the three but even without the ANR on it works great. It has lasted me for over 5 years already with no signs of needing to be replaced. I wrote a review of the different versions of Sennheiser headsets available at my blog:
Sennheiser HMEC 25-KA Headset: What Is So Great About Them? Almost the Speed of Sound
Good luck!