989 Graffitti logo design

I want a logo designed using a graffitti type style although more readable. It is for an aftermarket auto accessorie installer dealing mostly in car stereos so needs to be cool, modern and eye catching. I'd like it to look like steel and in the future will be using it on a steel plated sign so needs to suit this. I thought maybe an audio type symbol (sorry don't know the name)other than a squiggle lengthways beneath the wording. for font i'm thinking a similar image to the west coast logo attatched although not copied of course. Colours are Silver, Black, Lime Green.