Complete beginner looking for advice...

[Reactor]

Hi guys, I've always wanted a subsim, and the other day I went and picked up DW on Steam. SH4 looked better graphically, but DW seemed much more rounded. Plus, a demo really helped! I know almost nothing about subs, planes or boats but am loving the game so far.

So, my question is... what are the best mods for the game? I'm after the ones which either graphically, or sound-wise enhance the game, but don't muck with the gameplay by adding features, or subs, or anything else I can't handle at the moment I've seen quite a few, but it's not obvious which ones are the later ones, or which ones really add to the game in a, "You must have this" way. Thanks to anyone that can offer a bit of advice.