Personal recommendation has to be Achedaway, I've got their gun and it has served me faithfully for over 2 years without a notable decrease in percussion, battery life (use daily and lasts over a week), or quietness (my old massage gun sounded like it was full of rocks after 6 months of use. My Achedaway sounds like it did when I bought it).

Edit: not saying 2 years of consistency is bifl material. But from my experience the lifetime of a massage gun maxes out at a decade or less. So many fast moving parts. The fact that this gun is basically perfect after 2 years is a fantastic sign to me