Good Economic Tire?

[Perfectlap]

I think that largely depends on your driving style. If you like to launch the car off the line at a red light or stop, trying to get from 0-60 as quickly as possible EVERY TIME then you'll severely shorten the life of your rear tyres.
If you take it easy you should easily be able to get 15000 miles or longer from a set of Goodyear Eagle F1's or equivalent Bridgestones in the back and longer mileageo up front.

Seems to me that $600 tires are inexpensive but will get loud sooner, $800 can buy you excellent performance, low noise and moderate durability and $1,000+ tires (and higher) are equally good on performance, noise and durability but more expensive for some reason, probably the business costs of doing testing with Porsche for N rating.