Ok so don't shoot me... I'm not not well versed with portable hi-fi equipment and technology. I have a small predicament and am not sure how to proceed... My piece of crap Dr. Dre StudioBeats that I bought from a colleague for $160 broke down and I plan on replacing them with a decent pair of cans with noise cancelling. I really don't want to spend more than $350 CAN, at least my wife doesn't want me to... My source is my IPOD touch. I own a pair of Denon ADH2000 cans that I use at home with my CEC HD53R V8 or my Rogue Audio Cronus amplifiers. I don't really want to commute with my ADH2000s. I currently use AAC files on my iPod Touch, and will be buying an app to play FLAC files. I commute everyday to work by train, and I want to buy a pair of noise cancelling headphones to use with my iPod Touch. The one feature that I enjoyed about the Beats headphones was the voice cancelling functionality that distanced the other cellphone using, and obnoxiously loud talking commuters. My original plan was to first buy the AKG K495 and then discreetly purchase the ALO National amp with the Cricket LOD in a couple of months; however, I learned that noise cancelling headphones do not benefit from portable amps. Are there other closed headphones that offer a better than average noise isolating capability that you guys could recommend? I'm thinking perhaps the AKG K550? I'm thinking that I will have to compromise sound quality for good noise cancelling capability. And no, I'm not buying any BOSE QuietComfort headphones... By the way, I love this site... My wife called it a money pit.