Have both use Pilot PA17-79 DNC XL I find these good, tried Bose (did not like them, small ear cups big ears)
Also use the Mach 1 "with custom inserts" are the DBs for longer flights (could not get on with standard bits supplied) & if you can get use to the ear moulds, some people find them really uncomfortable.
Don't think they do single plug or low impedance Mach 1, make inquires.
Not tried Clarity or QT but GP really likes them
Also remember ANR does not protect the ear as well as inserts
Last edited by 500e; 10th Oct 2010 at 22:38.