Your Contis are due for replacement on age alone, before that two years is up. And that's only if they were merely months old when they were installed. Tires are now considered "expired" at seven years.

Even an R rated tire is good for steady 70 MPH. A T rated tire will be fine but, considering the minor price diff to go H rated, why scrimp? Personally, I look for minimum A temp rating also.

Don't underestimate the possibility of finding your choice tire locally for nearly the same price as tirerack + ship + installation. My last set of Firestone LH-30s cost about $4 less per tire at a local chain than it would have cost dot-com... and I know just who to go to if there's a problem.