I've got DC H10-13.4 with after-market ANR kit. Excellent all round, particularly cos I've been flying Bongos recently, one of the loudest of all aircraft. ANR kit is pretty thirsty on 9V batteries, my rechargable NiMH 9Vs last about 6-8 hours, so that's a pain in the asre.
But I too have had some minor hearing loss (mostly from activities prior to aviation), so have no hesitation in paying the money. As mentioned above, the fatigue factor is very much reduced, something which you don't credit until you have flown with ANRs.
I'm saving my pennies for a set of DC X-11s; I'm surprised they haven't been mentioned yet on this thread. By all accounts equal to the Bose for noise cancellation and comfort, but with DC warranty and peace of mind, also built-in adapter for mobiles/MP3s. Cheaper too, by around $100.
REALLY keen to try a pair. Anyone flight-tested these?