I thought It would be fun to do a quick survey of how the Tuscany runs on your system I get an average of 130fps @ 1280x800 q6600 2.4ghz 8gb RAM, ATI 5770.
When I ran it @ 1280x800 it locked mine to 60, and was rock solid for every area except when turning around to face the villa when on the tiled area overlooking the sea. Also a slight drop (only about 3 fps) when approaching the window looking into the villa from this side.
T_T I don't have my oculus, so I can't really say a ton. I'm also locked at work for another 2 hours, so I can't even run it without the oclus to see. (Can you run it without the oculus?)
Right now I get around 30-50 fps with hawken maxed out and physx on at 1920x1080. I figure at 720 with the oculus I can probably keep it above 60fps with physx off.
My Rift hasn't arrived yet, so I just get side-by-side rendering. But it runs vsynced at a rock solid framerate. No wonder, it is a quite simple demo after all.