Used DC 10-20's, 13.4, then 13.4XL on various piston & turbine types for about 15yrs, then switched a couple of years ago to Quiet Technologies PNR in-ear headset.
Noise reduction as good as the ANR on the 13.4XL, but feels light as a feather, almost like not wearing a headset at all. I use the ear-plug foam inserts, although you can get custom moulds for a closer fit.
Biggest bugbear is getting the mic to stay close to the mouth, but am still getting the hang of it.