I'm running Nitto Terra Grapplers, which are an A/T tire. That being said, they have EXCELLENT road manners. Aggressive tread with hardly any noise, and pretty good wet traction for the summer. They excel in snow and ice though. I'm thoroughly impressed with them so far, and they won't break the bank. They have gotten my safely through three or four very serious snowstorms.
It's up to you if you want to run two different types of tires, but I think that for a general all purpose A/T, the Nittos are hard to beat for the price.