Primo makes fine tires. Those tires are fine for touring since the inverted tread is decent for a lot of surfaces. The tire itself is a bit stiff so the ride will be a bit harsh; but because it is so wide -- I think that it is 1.75" -- you can lower the tire pressure a bit to compensate. If you are going on a tour that is predominantly on the road, you might consider switching to the kevlar Primo Comet 1.5".
I recall that Continental also makes a tire for "city" riding that is more than acceptable for touring.
We generally use Schwalbe Marathon Racers. In addition to the performance aspect, durability seems good; although not as tough as the regular Marathons. Since you have a Llama, you can also fit the Schwalbe Big Apples.