Just be prepared for the H scenes (which are terrible and worth skipping but ALSO surprisingly fit better with the whole setting than whatever crap they used to censor them, i.e. CG DRAGONS).
So is the Realta Nua patch just the voices plus some music? I think I just played the PC version with a voice patch and that ended up being fine. The point, though, is that you should get one of the versions and play it. That is what matters most.