I concur. I've got a pair of HD-380 Pros at my home workstation and a pair of HD-280 Pros at my office workstation. Both are comfortable with good isolation (considering these are not actively noise-canceling) and very good fidelity for the price.

I've used a few other brands in this price range (beyond $100 but not in the stratosphere of audiophile-grade headphones), and I feel the Sennheiser Pro line is unrivaled in this "prosumer" bracket.