Now I know there have been lots of these earphone related threads but I'm still confused at which ones to buy.

I want:

*Comfortable earphones that stay in place while moving around.

*Earphones that cancel all (or at least most) outside noise.

*Not too much bass, or maybe ones that have the option of bass adjustment.

*Somewhere in the region of £30-50 (I will consider more expensive if this is an unrealistic price for some good quality ones).

*It would also be a bonus if they didn't let out too much noise either.

Thanks