I use the Sony 7506. I see more FOH and Monitor engineers using these than any other kind. I love mine. They have great reproduction and are way beefier (made of metal rather than plastic, but still very light and comfortable) than any other headphone I looked at (and I pretty much went and tried just about every headphone in the $100 - $300 price range. Audio Technica, AKG, Sony, Sennheiser). I wasnt looking for open phones though, as I use them for FOH and Monitor's. They fold up so they can be stored in the little carry bag they come with, so just shove them in teh backpack or whatever. Another really nice feature of the 7506 is that you can replace any part on them. They come with a blow up part diagram and part #'s, so you can order that part and fix it if any thing goes wrong. These are designed to last a very long time. I know guys that have had the same set for almost 10 years and used them regularly for live gigs. Just my .02.