Best case scenario for Florida would be if Irma hugs north coasts of Santo Domingo, Haiti, and Cuba where the mountains greatly reduce Irma's strength. Then the cold front moving into Florida keeps Irma south of Key West until it turns north into the Gulf west of Florida where the cold front diminishes Irma to just a tropical storm. This scenario would just see a lot of rainfall for Florida but no hurricane strike.
In a couple of days we shall see how this scenario starts playing out.
Yow! Just my luck that my post is #666 on this thread.