I like my five string and it's my only electric bass unless I've brought out the fretless. Though listening back to my bands last album and the rhythm section tracking we've just done for the next one, I'm extremely sparing on where I use notes below E, it really is only a handful of places where it makes for a more interesting variation on a line, plus a couple where I wanted to underpin a guitarist in DADGAD. So I could absolutely do it with a four string plus Hipshot, if I chose to.