I am looking for a new pair of headphones for listening to all types of music from electronic to classical. Currently I am using a Sennheiser PX 100 but they are getting old and on the verge of breaking. I listen to AAC audio at 320Kbps and some apple lossless. I only listen on my computer or my iPod touch ( my computers sound card puts out 32bit 98KHz ) I also want a noticeable upgrade from my PX 100's. I can spend a maximum of $200 and not a dollar more. What do you guys recommend? Some headphones for thought below? I was looking at the Denon HD 1001K for about $141 would this be good? and if so will it be a big upgrade from my current headphones? Possibly the PX 100's MK II? $70 Audio-Technica ATH-M50 $150 Sennheiser HD-595 Premier Headphone $180 Thank you for your help in advance Also I don't want any recommendation for Bose, I am not a fan of artificially enhanced sound. I want something that sounds the way that the composers wanted there music to be heard.