On the Provari, you wont need a battery with a high amp rating. The 10A limit on the 18650 aw imr is more than sufficient as the Provari itself has a amp limitation of 3.5A i think. So getting a battery with higher amp rating for it would be a waste imo.
In any case, the Provari would only work with nipple top batteries and the aw imr are the best for it. If you want something with higher capacity, try looking at the orbtronic batteries, tho i cant be sure if it would fit well in the provari as it is slightly longer than the aw imrs'.