Coyotes at 100 yards, I think any AR15 can handle fine. Most AR's will get to 1 inch groups if you hand load.
Many times the more expensive AR's you're paying for the furniture. Meaning, the stock, etc.
There are some AR15's available in the $500-$600 range that are still plenty capable and have great reviews.
Sometimes it's cheaper to buy one right away that has the furniture you want and is already free floated, if you know you will want to do that stuff eventually.
I actually prefer AR's without the forward assist on the upper. I'm not going into battle with the rifle and not having it saves on weight. However, I do think I am in the minority with my opinion on that. You can find AR's that are under 6lbs for sure.
AR's are a very individual thing. They are fun to modify, analogous to owning a Jeep Wrangler.
Prepare yourself for a level of firearm elitism that you have not experienced before. You may be ostracized if you purchase an AR that is not considered "cool" by the right crowd of folks. Just laugh them off.
You can have a pretty nice trigger for under $30 in parts. You can have a really nice trigger for around $50 in parts. Or you can buy a drop in trigger from a company for over $200+.
From what you described, I would not go with a chrome moly lined barrel.
If you reload, get something to catch your brass right away. Like a Caldwell brass catcher or something.
AR's are a lot of fun. You will love it, no matter what you end up purchasing.