You don't have to spend a lot to get great headphones. We tested six full-size models that each cost less than $100 (one of them significantly less), and we came away impressed by what you can get.
Logitech's UE 4000 and UE 6000 use different designs: The UE 4000 is an on-ear headphone, while the UE 6000 is an over-ear, noise-canceling model. But they're otherwise similar, with very good midrange and treble that can be obscured by too much bass.
The Image One is a well-built and well-appointed headphone that will please people who like music served loud and with lots of bass. Buyers looking for accuracy and a balanced sound should look elsewhere.