I need to replace the 285/30R18 Rear tires on my '03 911 Cab.

I live in the suburbs so it's rare that I go faster than 90 or 100 but I do like the way my 911 takes the twisty curves better than the other cars. It's like I am velcro'ed to the road. I am not a competitive driver.

Anyway, is it worth the extra money for the Michelin Pilot Sport versus the Michelin Pilot Sport A/S Plus tires?

The dealer wants like $440 per tire for Pilot Sports but as you know, you can get Pilot Sport A/S Plus on the 'net for $336 a piece out the door including delivery and road hazard insurance. Add another 25 a piece for installation.

Also:

- Do you need a Porsche dealer to put tires on a 911?
- Do you need a front and rear wheel alignment when you replace the back tires?
- Do you recommend road hazard insurance for tires?

Thanks