Hi!, I want some headphones for office use. I'm a computer programmer and I want to isolate from the office noise and to be under US$200 At first I thought to go with some active noise cancelling headphones. So I've been looking to the Audiotechnica ANC7B and the Logitech UE 6000. Any thoughts on those headphones?... is the way to go? May be I just need to get a nice Closed Back/Sealed headphones instead of ANC... but there are to many options.. any suggestions?? thanks!