I've heard Bose stuff. The noise isolation is actually pretty impressive, especially if you don't like IEMs. However, sound quality isn't that great, and they cost a fortune - the $150 Triports are kinda crappy.
The best headphones for the dollar are, in my opinion, the Phillips HP910s. They look kinda stupid and the open design results in little sound isolation, but they sound quite good and are surprisingly comfortable - and they're only $40. The closed-can JVC HA-RX700 is even cheaper, and comes very highly recommended (though I've never heard it); the slightly more expensive HA-RX900 is slightly more comfortable but has a semi-open design and many people find they actually sound worse than the 700s. Finally, there's the evergreen Sony MDR-V6/Sony MDR7506 (same thing, different name); while it's more expensive than any of the above headphones and doesn't sound quite as good, it makes up for it by being collapsible, stylish, and almost totally indestructible - if you want something that can be carelessly chucked in a backpack, the MDR-V6 is your choice.
The best headphones for the dollar are, in my opinion, the Phillips HP910s. They look kinda stupid and the open design results in little sound isolation, but they sound quite good and are surprisingly comfortable - and they're only $40. The closed-can JVC HA-RX700 is even cheaper, and comes very highly recommended (though I've never heard it); the slightly more expensive HA-RX900 is slightly more comfortable but has a semi-open design and many people find they actually sound worse than the 700s. Finally, there's the evergreen Sony MDR-V6/Sony MDR7506 (same thing, different name); while it's more expensive than any of the above headphones and doesn't sound quite as good, it makes up for it by being collapsible, stylish, and almost totally indestructible - if you want something that can be carelessly chucked in a backpack, the MDR-V6 is your choice.
