Hank has given you some great info.
One more question, do you have a grill now? You said chick breast, not whole chickens was your goal. I just did some wings on my MES and between dry brining and a couple minutes on the grill at the very end I had nice crispy skin on my wings.
We you like BBQ, Grilling, etc. you still need a grill regardless, so you can use it to finish off stuff if you want the crisp. Not so easy with whole chicken but for anything else it would be.
On the pellet front, there are some that are suppose to be able to smoke and grill. But I have seen lots of comments that they don't do a great job of grilling because you can't get enough direct heat for a good sear. I have no personal experience, just based on post I have seen.