If you can get comfortable with a five string neck and can afford a bass with good low B sound, then sure, get a fiver if you want one. Esp ltd F series with their 25 scale necks are among the best fivers for budget basses imo. Ibanez as another good choice but their low B isnt as good imo with the 34 scale. Yes I know you can get great low B with 34 scale but basses like that generally cost a lot.
In your price range Id look at spending $300 or so for the bass, which means used for a fiver. Upgrading your bass combo amp will also improve your sound a lot. Look for used peavey minx 110 or other 10" speaker bass combos with minimum of 30 watts. Good choice for at home in bedroom etc little amps. For bass, used is best choice to overall. Though the Ibanez sr300 and esp ltd f154dx and b154dx are in the $300-$350 range new. So used one ig found should be gettable for like $250 or less imo. Though for iron maiden and sabbath fan, P pup basses would be good choice. Geezer used roundwound strings, iron maidens bassist uses flats. I hate flats for sound and feel, but many like them.