I started out with a pair of Sigtronics, not sure what model (I'll check as I still have them). They worked great in pistons and they were comfortable as well. The mic was pretty good, the only thing I changed was I went to DC gel ear seals and it made a world of difference in comfort and noise protection from the stock plastic ones. They are pretty old and I still keep them handy for backups. As I recall they were the S-40 model but they may have changed since I bought them (going off memory here, I'll make sure).