IEMs will be a lot more portable but generally have lower quality sound for the price. I do swear by (rather than at) my 1More Triple Drivers, but I put Comply tips on them to make them comfortable. Their foam and silicone eartips, in spite of the 9-ish sizes it ships with, aren't comfortable for my sensitive ears. I found that the Triple Drivers at $99-ish plus the isolation eartips from Comply total up to 120 or so plus tax, and shut out sound great. They also are a ton more portable. If you don't need a mic, the Sennheiser .HD598 Cs sound pretty decent as closed headphones go and are $130 or so on Amazon. Blocks out the noise at work (though not as well as properly-sealed IEMs).