I could've googled this but it's not all that important and it opens up some discussion;
So I was only about four episodes into the original Stay Night, and from what I understand this rework focuses on Rin's point of view instead of Saber's? If that's the case I'll probably finish the original first.
Also: If I end up finishing the original (Saber), would it make more sense to watch Fate/Zero then the new Fate/Stay or just watch both Fate/Stays, absorb the story, and move on to the "prequel."