I bought the e5c's 2 months ago to replace my bose QC2s. The bose are collecting dust now - no way am I going back to them. I go into my own little world wearing these things. On flights FA's have to tap me on the shoulder now for drink service or I don't even notice them.

As for sound quality, I find the the e5c's to be excellent. I'm going back to some of my favorite music and hearing imaging and sounds that I never heard before. (although AAC 128 on iTunes leaves a lot to be desired!).

highly recommended to anybody considering...