I'll put another vote for the mach 1. I've had mine for about 4 years. I've broken them twice(both times my own fault), and both times they given me a brand new unit. I don't know much about the quiet technology unit but the mach one is about the quietest thing around...better then the Bose IMO and their customer support is second to none. As for price I paid $415 plus the cost of the ear molds(I believe they were about $50 from the audiologist.) It's an investment in your health and comfort. Don't skimp.
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