Etymotic - earbud heaven
I use a pair of Etymotic ER6i's.
They feel a bit weird at first (need to be deep in ear canal and forma seal before you get any bass), and they're really
not cheap (about £70), but sound better than anything else I've ever heard - headphones or speakers.
The sound damping is great too, and I listen to music at abot 1/4 of the volume it would otherwise be, either on the bike or on a flight.
Highly recommended if you are going to use them / appreciate them enough to make it worth while.
http://www.etymotic.com/ephp/er6i.aspx
http://www.expansys.com/product.asp?code=118586
However, I'm tempted to try autocom, as want to be able to listen to music and get GPS instructions as well.
But the wind noise on the GS seems very loud to me (first bike for a while) - even though BM claim the helmet is super quiet. Now if autocom had a system for reducing ambient noise like the headphones at the top of this thread, and if it actually worked, like the bose quite comfort headphones, that
would be worth having. Until then, I might just stick with the etymotics, listen to great music, and occassionally get lost.