If you're pretty comfortable with stock SH3, then would say it's time to amp it up a bit.
There is LSH3 2015, which is still good... though there have been 2 recent reworx done, LSH3 2020 & LSH3 2022
Then there are the following which are predicated on your already having unfettered access to having SH3, BUT... do NOT require you to use that stock copy to run them, as the mod maker for them, have already laid out the grunt work for the player.
OneAlex's GWX Reworx... latest is, v1.52 (there was word of an update being done, but... owing to whats going on over in the Ukraine, well.... *throws up a prayer for OneAlex as well as all over there in that country*) that may, or may not get released.
Ok, moving on...
Fifi's hardcore enhanced NYGM. With this one Fifi's (like with OneAlex) has done most of the grunt work here for the player... though, there is still a wee bit that you will have to do. Unlike OneAlex's, this does call for you to use a copy of stock SH3 to set up.
Next up, is ToyotaGT86's GWX reworx... Screenies & such that I've seen, look great... on this 1, I'm still in the process of seeing of getting this up & going.
After that, is GWR, by Anvar1061... believe this 1, calls for using a copy of your stock SH3... tried setting it up a bit ago & ran into difficulty getting it set up. Though, not to discourage any from going for it... that was just Me. Am still considering giving it another shot, here sometime.
Last up, but certainly not all of the choices, just gonna focus on the ones I know of... that are still undergoing updating that I'm aware of... is:
WAC (think the latest is v5.x *x being unknown on the exact designator here...*
) Any who.... screenies & such, that I've seen.... look great, as with Anvar1061's GWR, this is another that I tried a bit back... & may see of retrying again, at some time. Soon as I can see of having a bit better rig than what I'm on now.
That's all those that as I know of, are still being updated... currently, as mentioned... there are others but those are oldies but still goodies...
as is, the 2 out of those that I have set up & using are Fifi's enhanced NYGM & OneAlex's GWX reworx.
As always, is hoped that this info, is found to be of help...
Gute jagd, ihr Himmelhunde.!
M. M.