I have a Lightspeed Mach 1 that I really like. It works great in all of the planes I've flown - pistons and noisy turboprops. I assume it would work well in pretty much anything. Its definitely a lot better than the David Clark I replaced with it, and I prefer it over the Bose headsets that are in some of the planes I fly. It is much more comfortable than the old David Clarks and the noise reduction is better (my DC was passive noise reduction). I would say the noise reduction falls somewhere in between a passive headset and an Bose. Buy the clarity aloft ear tips - they much quieter and better than the Lightspeed ones, and connect to the lightspeed just fine.

My only complaints with the lightspeed are: The earpiece with the mic doesn't always want to stay in place, that can get annoying. Also, he headset seems flimsy and has had to be repaired once, and I'm probably going to have to send in again because one of the clips is broken and it is driving me crazy. Lightspeed is great about fixing it, but it is kind of frustrating because I feel like I'm very careful with it.

I tried the Clarity Aloft at Oshkosh and I really liked it too. It was a bit heavier than the light speed, but didn't seem to have the flimsiness issues that the lightspeed does. IMO, it is probably not quite as comfortable as the lightspeed, but I wouldn't have the issues with the mic earpiece like I do with my lightspeed. Personally, if I need to replace my Lightspeed I would consider the CA, and I would prefer the CA or Lightspeed over Bose any day.