sound deadener on 1999 Porsche 911

I love my car but I can't take the road noise. Whats the best way ti deaden the noise? I've heard of getting it undercoated and then someone else stated to but dynamat down in the back???

Asked by for the 1999 Porsche 911
Did you try different tires? They could be the source of the noise.

1 more answer
Hell, do both. Is there a Porsche owners site that has opinions online?