All you need is one tip toe down at stop lights.
You can jump off and walk it back if need be.
C10 will post here soon I'm sure.
He says he's 5'1", and I think his Busa is raised an inch, so he can give you the best 1st hand info.
I'm 5'10" and flat foot most sport bikes when seated. But some dirt and street dirt bikes put me on one foot or tiptoes.
It all really comes down to what YOU the rider are personally comfortable with. Because once the bike is moving, it really doesn't matter.
As said above, once you lower the bike in any way, you affect the handling in a negative way.
Best thing you can do is set the suspension sag for you, your weight (spring change if need be ), and learn to ride it as is.
You'll be happier in the long run