planemad_bk
many threads on this very topic.
I've tried the Senheiser HMEC25 in the aircraft (Bae146) but preferred the Bose. I found the speaker design of the Senheiser uncomfortable as I prefer the whole ear to be encompased, a la DCs etc.
The Senheiser HMEC40 and/or 30 somthing I found far too heavy.
From a set of AA batteries in the Bose I was getting 100ish hours of excellent ENC listening. Individually adjustable ear volume, light (not as light as the HMEC25) & comfortable.
Robert Elber @ Bose Aust 1800 023 367 (Sidderney)