Telex 850 is the best of the group for the CRJ 200/900. You can stay in hot mic (provided you use and replace "as needed" the mic foam "condom"). They last a few years, cheap to replace and normally are falling apart when the ear foams die, $30 for ear covers and a mic cover. Had mine for almost a decade and never heard a complaint from either seat. Quiet (noise cancelling), comfortable for long periods (although I tend to go topless when more than 2 hours enroute), and you can breathe normally without the other guy hearing it. Some love the ear clamps (DC and such.... I don't get it), and others use the Bose with mic (more expensive and can be uncomfortable if you wear sunglasses (personally, always do unless it's night flying). Keep it simple. Buy a pair of 850's from the start and be done with it. You can wear glasses, or sunglasses and always be comfortable, cockpit is quiet, and the other guy isn't listening to you huffing and puffing over comments and thoughts. Words are easily conveyed on the mic and intercom and all is well. Until you fly in a super loud or super quiet cockpit (CRJ's are middle spectrum in my book) the -850 is a winner for the cost and benefit. But hey, try whatever. Most are using 850's or 750's with plugs. Some linger outside, and they seem to always preface the fact that's they are trying something different. 850's work great out of the box and and are proven to work well for all conditions. Plus, they fit in the flight case, hopefully soon the soft side briefcase with the efb. Time will tell, been hearing that line since 2007.