I tried all different options from metal, gut, weed whackers, pretend guts, rs4000 (which felt like two different sets of strings), bumping stings and anything in between. All had merits and downfalls. A lot of money spent but I would often pick up used sets, which do appear on this site. This will save a bundle and you get back what you pay it you don’t like them.
I also tried a few options from the Innovation range and settled with the Silver Slaps as my preference. There’s a fair sustain from the Innovations and not too harsh on the slap. They lasted and absolute age as well. Innovation may have other sets available now as this was a couple of years ago and I now just play bass guitar.
The above was my journey and my preference - others may have differing opinions.