In short, when I get mine, I'm going with the same tires.
Prior to driving a rig with them, I was very concerned about road noise from them, but in mixed city and freeway driving, the only time I noticed any above average noise was at low speeds(< 20MPH). Keep in mind too, that nwoods has the somewhat skinny versions of these, and so if you are considering a wider tire in the same tread pattern YMMV. Sure, a less nobby tire will be quieter, but inside the cabin at highways speeds, it wasn't the tires that created the most noticeable noise, it was the wind ;-) (I think).