http://nrvnqsr.proboards20.com/index...ead=1181091213
This is the best Shirou + Saber fanfiction that I know of. As long as you kind of ignore the Transformers parts of it, the Shirou + Saber parts are beautiful.
If you like giant robots, you don't even have to ignore the Transformers parts. Then the entire thing is beautiful. Nerroth somehow integrated two widely disparate universes into one story.