I did tech support a few weeks ago for a Salsa band, and the Front of House engineer used noise cancelling in-ears that cost him almost $1,500.00. Yes, 15 Hundred Dollars. I don't care how well they cancel noise or how good they sound, I'm never spending that. And then we looked up IEM earbuds, just the basic ones from Shure: $150 per ear, plus the cost of the mating cable with 3.5mm plug on the end.