The Steelseries Siberia 840 is great - I've got the 800 and the quality is amazing. I've never had it drop out in the entire time I've had it. It comes with 2 batteries, the idea is you use one on the headset itself and the second one charges in the control unit. Once the headset battery dies (about 6-8 hours of prolonged usage) you can swap out the battery and charge the dead battery in the control unit. AFAIK the 840 includes bluetooth, so theres more connectivity in that model compared to mine.
Only cons would be a not-so-great quality microphone. It's passable though for every day usage, of course it wont compare to your average desk mic.