16 Mhz!?!!? Christ - that's amazing hearing!  OK - know you corrected that, but couldn't resist...

My Eustachian tubes keep blocking up so my inner ears won't pop - so I can sympathise on the bass side of things.  Rest assured though that headphone bass is MUCH easier to get right then loudspeaker bass - for deep clean bass a'la hifi shows, you need RAW POWER in reserve - and that's not cheap - well, not cheap done right anyway!