I don't see it as an either/or.
I like Rickenbacker 4-strings, with a drop-D eXtender if they fit the model.
I like my Warwicks best of my 5-strings.
In the past I've used bass pedals to play below E down to C for odd notes.
I've also got a fretless, a short scale, one or two guitars (including one tuned to DADGAD), a mando tar, and maybe one or two other things.
I've not got to a 6-string bass yet, but I'd likely have low B and high C to cover both ends of the spectrum.