Well, this is the last of the main Fate series. I believe there's a movie and a magical girl AU series, but I'm probably not going to watch those. Though, I've heard they're planning a trilogy of films to cover the third route from the VN. No idea when that'll be, though. So, for now, at least, this is it.
( Spoilers, of course )
So, final verdict? I really liked it. I'd say you should just skip the original Fate/Stay Night anime and watch Fate/Zero and Unlimited Blade Works instead. You could probably watch them in either order; no matter what, watching one will spoil some parts of the other. I watched Zero, then UBW, and I feel that worked well. But I guess you could do the opposite, if you wanted.
( Spoilers, of course )
So, final verdict? I really liked it. I'd say you should just skip the original Fate/Stay Night anime and watch Fate/Zero and Unlimited Blade Works instead. You could probably watch them in either order; no matter what, watching one will spoil some parts of the other. I watched Zero, then UBW, and I feel that worked well. But I guess you could do the opposite, if you wanted.