When I'm mixing, I have a set of Senn HD280Pros sitting by my console at all times. For the price, they're the best sounding, most comfortable Supra-aural phones I've been able to find. That said, on stage I'm IEM all the way. Partially it's from an aesthetic perspective... wearing cans on stage would look a little weird to me. Also, I tend to move a decent amount and cans would likely fall off. I've been using UE Triple.Fi 10s for about a year and while they sound awesome, they're about the worst fitting universal IEMs that I've encountered. Just sent them in for a custom reshell, and I think that might set me for life. I plan to use them for everything except mixing (on stage, casual listening, biking, ignoring co-workers, etc.).