Should I get a 4 or 5 string bass?

I've been playing guitar for about five years now, and I've finally decided I want to get a bass. Im gonna get a Schecter Stiletto custom but I'm torn on whether to get the 4 or 5 string version. The kind of music I play is almost all metal, stuff like sevenfold, metallica, 3dg, breaking ben, tool, etc. Anyway, if you guys could give me some advice on which one might suit me better it would be greatly appreciated! Thanks =D