Errrr - guys
I think some of you are is missing the big picture here.
Practically, V1 CANNOT be higher than Vr because there is not a performance manual in the world that contains an accelerate - rotate - land again - stop distance for an aircraft. By definition it is agreed that at Vr you are committing the aircraft to flight, and that there is adequate performance to meet the obstacle clearance criteria following an engine failure at V1. If you were to reject the takeoff after Vr, how are you going to KNOW that you have runway enough to stop. Come to think of it, you have also got a problem then with gear configuration (i.e. when do you pull it up if the runway is long...)