If you go to the big box stores or rat shack, the salesweasels cannot spell HDRadio.
Coupled with the terrian in the market, HDRadio is a big no-shoe for the population. It's not going to wear well in the car.
Best option would be satellite radio -- I get better reception from XM than with HRadio. the only sure listen is 96.5, 94.1, and the rest are iffy at best. In fact, I can get la LA stations better in Norte County than Sandy Eggo ones on HD.