I picked up some outlaw EFRA foams and am not turning back. I dropped some serious cash on belted rubber, hpi hard foam inserts, rims and at the end of the day had tires good for only a couple tanks.
The EFRA tires I run handled GREAT in a parking lot. I stuck to the ground like a wet dream! Keep some odorless CA on hand in the event you roll your car and see a tear begin on the tire. Very easy fix. Yes, foams will eventually chunk out, BUT, so far they have lasted longer and DEFINATELY stick better. I ran fatter ones in the back than I did in the front. Thus, the outlaw class.
They also usually come prebalanced. Something I can't do at home.
And as long as you dont have any major sideways impacts with the earth you should tear the tires apart.
Lastly, the one thing I have learned about on-road, not matter what, you will spend money on tires. Its a regular maintenance item. This is the one thing that best matches the real 1:1 touring cars.