Lightspeeds
I owned - in fact, still own - a pair of Lightspeed 20XLs. I've never had any major problems with them, they're very comfortable and the ANR is pretty good. The only minor gripe I'd have would be the battery pack which, depending on where the jack sockets are located in your aircraft, can hang awkwardly. It's not heavy though, so it's more of an annoyance than a problem.
I liked them so much I upgraded to the Lightspeed 30-3G earlier this year, and they're even better.
The downside with Lightspeeds is that they're predominantly marketed for the US market so, unless you live in North America, getting parts and/or after-sales service could be difficult -- although I've never had to call on their service with the 20XLs. Lightspeeds are also quite large. Comfortable, light, but large. Prepare for 'Mickey Mouse' jibes from your colleagues! If the aircraft you fly is small and has limited headspace (e.g. DH Chipmunk, Piper Cub maybe) then try a pair before you buy to make sure they fit inside ok.
HTH
Charley
p.s. as with any ANR headset, make sure you carry a spare, readily-available set of batteries when you fly!