@zigg @moiety It's helpful. The HD25s work very nicely without, fine for use on the bus and train - the Studio3s are just better still, to the point I'll often wear them on the bus even if I'm not listening to anything. ^_^ Would like to try some others as well, for comparison - the Sony equivalent always stacks up well.
If Sennheiser came out with a wireless HD25-1 II.. that'd be really nice; but I'm definitely not going back to wired.