I have experience with a few of the mentioned headsets:
1) Pilot PA17-79 - the headband is a bit unwieldy and high, and I found they sometimes slipped around, even when I'd adjusted them as best as I could. Passive attenuation was quite good. With the ANR on, they were definitely better, but I still didn't reckon they were THAT good. Battery held charge OK, and the fact that there is no box is a definite plus. Unfortunately, I had two sets fail on me, and I gave up......
2) Headsets Inc. conversion on a DC H10-13.4 carried out by Adams themselves. Very good indeed. It has been said that the installation of the modules degrades the passive performance somewhat, but there is no doubt that when you turn on the ANR, the noise reduction is excellent, and communication with ATC is very much clearer. Reasonable battery life - and now they have an auto shut-off, I believe. Usual DC close but clamped fit.
3) DC H10-13X Fabulous DC quality. Variations in the battery box over the years, but the 6 AA type is heavy - tuck it into the sidewall pocket of a PA28! ANR performance is good - not outstanding, but communication is very clear. Comfort as above.
Still have good passive performance if you lose the power (the batteries do last a very long time).
4) Bose X Most comfortable of all. No fatigue from wearing them. A little bit more fragile than the DCs perhaps, but the magnesium headband is very strong. They fit really well, and do not slip. Battery box is small (PP3 type - with a press-in fitting fortunately NOT involving clipping the battery on - those clips and wires must fail sooner or later - and they use one in the DC H10-13X to take the power from the removable 6AA pack! Maybe they've changed that in newer types), but the plugs are on separate short leads coming off it. So it can hang awkwardly in many planes. Battery life good. ANR performance is SUPERB. Wonderful audio quality. Passive performance is poor - so carry a spare battery (well, who wouldn't?). Expensive, but worth it - the dog's b-------ks!