Different people will have different opinions.. (like CS tyre threads haha...)
Go to a shop and listen to some .. use the thing you'll be listening to (i.e.: iPod / Phone etc) and play some stuff you'll be listening to normally.
No point buying something that makes dance music sound amazing when all you listen to is 60BPM jazz...
I bought a pair of Lindy noise cancelling closed 'phones for £40 through Amazon a year or so back when I was travelling with work.
http://www.amazon.co.uk/dp/B001COBIUY/?tag=cliospnet01-21
For £40 they are AMAZING. I'm not suggesting they're Bose/B&W quality but they're £40 not £300.
If they break or I fancy an upgrade, I'm going to get the big brother -
http://www.amazon.co.uk/dp/B00DNC9CVU/?tag=cliospnet01-21
As I think you know, Scott .. I'm a bit of an audiophile, and the £40 ones are absolutely magic IMO. Decent bass response (and not too bad on long flights etc from a comfort PoV.)
These get about 8.5/10 from me. They could be a little larger and slightly better made but from the price point - they're a full 10/10.