Steel tip is the only way to go IMO.
I am a bit removed from my league days (lessee, daughter is 6, so yeah, about 6 years
), but I used to play in 1st a soft tip and then for many years a steel tip league. I am not current enough to give you brand recommendations anymore (Black Widows were "the thing" back in the day), but I'd imagine you can find something for casual use that is comfortable for you in the 20 range.
Remember you can get different flights as mentioned above and different shafts that IMO drastically cahnge the dart also. You can get some spinner shafts that actually rotate (not automatically, just by force of air or another dart impact).
Get the little rubber washers (or o-rings) both for the shafts (and for the tipos if you get a set that has the convertible tips) that keep them from coming loose every other throw. That will prevent endless aggravation.