Best sound isolating headphones up to 300$?

[iEpica]

Ok, I need some headphones with VERY good sound isolation, almost as good to block out a jet taking off right next to you (exaggeration), of course awesome sound quality and a decent built-in microphone which is optional. any suggestions?

 

[Titillating]

If you're looking for noise-cancelling headphones, Bose is the brand to beat. Really doesn't get much better than their active noise-cancellation features. Having great sound quality is just another added perk. The Bose QC 25 was featured on Tom's Guide, where a review was done on it: http/www.tomsguide.com/us/bose-quietcomfort-25-headphones,review-2356.html