I commute overseas and have both Bose QC2/Ufly Mike and Telex 850. For traveling light and a comfortable headset, the 850 is great. I've jumpseated on the Q400 and used my 850's w/o a problem.

The reality is that the QC2/UFM is superior. It is multipurpose, comfortable, quiet and works flawlessly. I have little fatigue after a 6 leg day in the CRJ. The noiser cancellation is superior. After 3 years of heavy use, took the worn QC2's to a Bose store and they gave me a brand new set for $100. The QC2's are great for commuting. Even if I'm not listening to audio, I wear them. People leave you alone when you have them on.

Sometimes I still use the 850's. They are super lightweight and easy. Like I said sound level wise they were fine for me j/s on the Q400. On the CRJ200/700/900, 850's work fine with one MAJOR caveat: I need to use them on high gain when hot miking in order to hear the other crew member. When a master caution/warning chime dings, it's uncomfortably loud. It's not on low gain but, I personally cannot hear the intercom on that setting. That is not a problem with the QC2/UFM.

My humble opinion/YMMV

 

I tried the 850s in the CRJ200. They were ok in the newer ones with the flat style wiper arms, but the older style round wiper arms were much louder at high speeds and at least for me the 850s weren't enough. That's when I got the QC2/UFM setup. It's my favorite so far.