I used the Telex 850s and they were perfect, a little noisy if the side vents were not positioned right but otherwise they were great.

Unfortunately Telex headsets tend to have a lot of background noise from their mics so if you are flying with someone that has a set of head clamps then they will get some background noise whenever your hot mic is on. Instantly noticeable and annoying on the CRJ but it will take them a little longer to notice on the Q400.