I think one of the issues when switching from 4 to 5 is the string spacing at the bridge end. If your used to Fender style basses with 19mm spacing you may find some 5 s with narrower spacing ( I believe Ibanez have 16 mm) a bit off putting to start with especially if you are swapping between a 4 & a 5 regularly. On the other hand 5 string all wider spaced is quite a handful. My Gibson 5 has 19 mm which I like but then I play finger style. I’d find using a pick on that spacing challenging.
if you can find a 2nd hand Spector Legend they are great.