As a guitarist, I love the bright but smooth tones of the Everly B-52 strings. When I was looking up reviews for it I came across a lot of good reviews for their bass strings.
They have a special alloy that is 52% iron and 48% nickel (or is it the other way around?) which is more magnetic than pure nickel or steel, but lasts a long time. It's a real punchy sound but you might have to re-adjust your pickup height if you find them too loud.