Yeah, SH$, damn caps... whatever.
As the hardware seems to be discussed, check
http://www.subsim.com/radioroom/showthread.php?t=146795
if you havent already. You'll be an elite-skipper in no time.
when it comes to mods, there are a couple of really good ones. Both Trigger Maru and Real Fleet Boat are very good, although I like RFB more. It makes ship-damage far easier to understand. But with it you shouldnt try surface-shootouts with DDs or even Gunboats. You'll loose, and badly.
The RSRD also is a "Must Have" in my oppinion. Much clearer Missions, although I never had to recon harbors, rescue pilots and the like anymore.
Try Operation Monsoon if you want to play SS§ (SH3
) Netrebko-style.
If you do and like an intense Kriegsmarine-flair try Spaxx (install first) and Poulsen (install second) Soundmod. If youre not german (RealWorld) R.U.I.M. adds much flair to your crew. I promise you will use the F2-kea more often.