Speed for the actual weight is surely the commonsense answer.
Unless severe windshear is present (which changes the goal posts a bit), there is no operational advantage to boring down the runway to Vr speeds in excess of those for the actual weight.
Where Improved Climb speeds are required for performance considerations then obviously the discussion ends there.
I believe that accident studies reveal that engine failures are rarely the cause of aborts near V1 but that tyre failures are the real worry. I recall a figure published by Boeing that 27% of over-runs that turned into accidents were caused by tyre bursts or tread problems. Presumably the higher the ground speed, the greater is the risk of tyre wear and tear. In any case it would be preferable to have the safety blanket of a lower V1 which is not the case where the aircraft is deliberately and unnecessarily left on the ground for no pressing operational reason.