SH5 or SHIII + TGW?

[HarlockGN]

I recently got Silent Hunter 5, and started playing the campaign. I'm impressed by the graphics, but so far by little else.

Admittedly, i'm not that far in (beginning of 1940) but there are some details that I find honestly Jarring. For instance, I'm at war with france, but there isn't a single french vessel on the sea or in french ports (and it's not that said french ports are so far from my usual patrol routes that they can be ovrlooked). And I don't relaly mean that they should let me try and sink the richelieu (oh wait, they should, why not?). The big problem is that it seems to seriously lack in variation.

Now, I actually have SHIII, but I didn't play it much due to lack of time, I never tried it with big mods like TGW.
So I was wondering, which one is more worth my time? SH5 or SHIII+TGW?