Some years ago I played with SOC complete, mostly due to the fact it was a mod that you had no necessity to go on tweaking details... Install it and play. The only problem is that I had some random crashes while changing maps once in a while. I abandoned it in the middle of a playthrough. Recently, i had an urge of actually playing it with the intention of finishiong the game... I decided to go with the starter pack. It is essentially ZRP with some graphical improvements. I must say that complete looks beautiful, though a bit colorful... but the starter pack improves the graphics also and is less colorfull.
The only problem is that days are colorful and nights are gray, and in a night storm, lightining brings a flash of daylight, which means that enviroments get colorful, even when you're indoors, which is kind of annoying.