I've been using Sennheiser momentums straight from a iPhone 6/Spotify extreme for a while now for office duties (low leakage), then I came across a Sennheiser stand in Maplins today, gave all the displayed range a good go from the £45 20* up to the £280 NC's with the same iPhone 6, same track - The 25's did it for me, and some - brilliant! Sure, the clamping might be an issue with some, and the build quality is pretty poor, but my oh my - I can't wait for Monday