I used the Dillon and the Peltor T6 prior to having a friend loan me the Sordin when the Peltor's took a shit in a class. Ever try to get a out-of-warranty Tac 6 repaired? 3M just tells you to buy a new pair. I'm sure that's good for sales, but it speaks volumes about what they think about their own product. The MSA Sordin is a true professional grade hearing pro setup, and not in the same class (in either performance or price) as some of the other brands mentioned. Buy once, cry once. +1 for the gelcups, once you're at 350, what's 400?