I swear by Sennheiser CX-300s - they are cheap, easily replaceable and work very well for my non-discerning ears. Plenty of bass (compared to Apple earbuds at

I swear by Sennheiser CX-300s - they are cheap, easily replaceable and work very well for my non-discerning ears. Plenty of bass (compared to Apple earbuds at the very least) and shut out all exterior noise to the point of being dangerously approached from behind while working.