Tire Purchase Online
If you can go to a local shop and get reimbursed, it is OK insurance.
If you have to send the tire back . . . .

Extended warrantees, road hazzards . . . Just a safety, usually for me if I have purchased it, never use it, if I don't get it . . something goes wrong, Murphy's Law.
Also, are you going with the Pirelli PZero Nero? Those are what I have and they do pretty good at the track for a street tire as well.
The warranty we sell is very much worth it. If you are near a Discount Tire store...get it fixed/replaced there. If you are not near one, we'll send you a new one. If you are on a road trip and have to have one right then, we'll reimburse you. Its good stuff! 
