which sub simulator should i chose?

[nappy111]

Hello all. I have been away for a while, but now i am back.
There has been some new sub games released since last i played and
i was wondering if any of you guys could make any recommendations
as to what i should put my money into?
I am looking for a WWII sub simulator based on the following criterias:

1. i like to make all the torpedo solutions myself based on AOB, speed, etc which i calculate using ingame tools.
2. manual ship identification.
3. i am fairly tech savy so i am not afraid to install addons, or even make tweaks in config files if required.
4. Using windows 10.
5. As immersion as possible, The "feel" of the game is important.

in general, I am looking for a game where i dont just press a button to sink a ship. i want to work for my kills, and if i miss, it means i made a mistake somewhere.

Now, I know i probably will get several different answers, but i appreciate
them nonetheless, so any and all help appreciated.

Oh and if this has been answered a million times before, i apologize.

regards
Nappy