Quote: I won't be wasting my money on Momentum since they are using the, IMO, dated HD25 drivers inside (same as Amperior). These sound okay, but they lack detail and sub bass. Funny how Momentum is described as having an "industrial" design which is really out of the box for Sennheiser. I have a theory (just a theory) that Sennheiser wanted to rush something to market to compete with the M-100 right before the M-100 launch. The response to my theory has been that Sennheiser is so big, they don't pay attention to V-Moda....don't believe it. There are several headphones in the $350 range that best the Amperior and Momentum uses the same driver. I'm still anxiously waiting for my VTF-100.