Noise-cancelling headphones recommendation


Can someone please recommend an "effective" noise cancelling headphones for less than $40 using for 14-hour trans-atlantic flight. I did a search on Amazon and read the reviews, but all the lower priced noise cancelling headphones reviews are mixed at best. Please share your experiences.
pt999
The head-fi.org is a good resource. Wheen you do a search with them you will often find yourself on another retailer's web page. No problem; it just takes a lot of work to find what you want.
For the same reasons I ordered Bose, ($300) pair. they were nice but you cannot turn the noise cancelling option off, that after prolonged use gave me a headache. I returned them and went shopping. I found a pair of Sennheisen PXC 250, for $169. The Sennheiser have a PXC 150 that was $125 but the particular store was out, and I didn't have much time to look around. Well, I went to Europe and back, and I highly recommend this pair. For the movies and music they performed flawlessly. They are compact, easyly folded and have a on and off switch for "noise cancelling" which I found to be a nice feature.
I use Grado SR60's for flights to Asia. Sound better than any noise canceling headphones at a fraction of the price.