A lot of Audiophiles, and more often just beat junkies, swear by Senn's headphones. Their product line, though, is a little light in the middle, where most people actually shop. Hence the HD 4x8 series, which graciously starts at $100.
There've been cheaper HD-branded models for years, and they've generally been pretty great. The $100 price point, though, marks sort of a golden zone for headphones and earbuds—it's the most a lot of people are willing to spend, and where the hardware starts...