When I flew the 700, I used the Telex 850 ANR. It's a lightweight headset based on the classic 750, but adds ANR, which works really well on this headset, considering it's a lightweight. The 700 was about as loud as a 737 up front, and SWA uses the 850 as their official company headset. In fact, I still use that headset in the Airbus, and I used to use it in the 737. No, it's not as quiet as the larger headsets like the Bose you mention, but it's significantly more comfy to wear for an extended period (in my opinion, anyway).