Here is my take on it.
I am guessing there is an 80 inch antelope (they are not goats!) in probably every unit in the state, but killing one is alot harder in some units than others. The units where you have a better chance at killing one are also USUALLY the harder units to draw. So if 80" is your goal, and you only have one point, you will have to spend more time and hunt harder to reach that goal. If you are willing to spend some time and hunt hard, it is possible to do in most units.
The problem with most of us, myself included, is that we want it to happen in only a few days of hunting and when it doesn't we give up and shoot a smaller buck.
Either way, hunting antelope is fun and you don't have to reach 80"s to make it so.