I use 1.33 qts per lb of grain, but I know a lot of others use 1.25. The mash out kills the enzymes at 168, but I go up to 170 without any issues. Don't go any higher than 170 or you'll start getting a lot of tannins out of the grains.
From my experience the AAU % is always higher with whole hops since they're less processed. So even though you get less utilization with whole hops, the end product ends up being very close to equal no matter which one you use.