I wish I could afford the Bose ones as undoubtedly they are the best, but I'd have to get a decent job our of the aviation industry first!
I bought Sony in-ear ones for about £45 and, while they worked fine, they hurt my ears after about 2 hours or so. After about three months, an intermittent fault developed in the cable causing one speaker to keep cutting in and out! Secretly, I was glad because it meant I could justify replacing them.
So, I now have a Philips neck-band over-ear set purchased from Dixons at LGW North Terminal tax-free for £45 and they do the job very well - the Noise REduction circuit claims tto eliminate over 80% of background noise.