I like an airplane that talks to you! 757 767 don't really talk to you at those speeds, so an overspeed can really sneak up on you with little warning.
Thats what the instruments and the overspeed horns are for. Most modern flightdecks are very noisy, one aspect of a/c design that has gone backwards. DC9 was almost silent even at high speed, very nice. The Airbus is noisy even when you are sitting on the ground, it's only when you turn it off that realise how much damm noise it makes.