Reddit mentions of Lightspeed SIERRA ANR Aviation Headset

LightSpeed Sierra
Price: $650

Pros

• Cheaper ANR than the Bose A20 or LightSpeed Zulu.2's
  
• Very Comfortable
  
• Bluetooth
  
• Light weight
  
  Cons
  
• ANR is not as good as the Bose or Zulu.2's but it's hard to tell without a side by side comparison.
  
• Feel cheaply made. Plastic instead of brushed metal or aluminum.
  
• Slightly heavier (1lb) than other ANR headsets.
  
• Bulkier than the Bose or Zulu.2's
  
  I own both the LS Sierra's and Zulu.2's. And I know a few people who have the A20's. I tried the A20's on and prefer the Zulu's and Sierra's over the A20's simply because my ears are bigger and I have more room to cover them.
  
  Both are great headsets. Love them both. Sierra's are definitely worth the money you pay for them.