To summarize:

Enigma: Rising Tide:
+graphics seem good
-not historical scenario but historical ships
-not dynamical campaign

Silent Hunter III:
+dynamic campaign
+historical
+many mods
+good graphics

Task Force 1942:
+good gameplay
+historical
-no carriers

Corsairs 3
slightly older historical period


I think Silent Hunter III sounds very interesting. When it comes to Task Force 1942, which I also think sounds interesting, I couldn't find any information, screenshots or a place to buy it anywhere. Are you sure Task Force 1942 was the real name of the title, or is it so old that it's impossible to get hold of?