A good tournament that i'm going to is the Tippmann World Challenge at the Hell-Survivors Field in Pinkney. It's all Tippmanns versus any other gun. Thousands of people from around the world come to play in this 2-day tournament. It is a huge tournament including airplane insertions, truck insertions, paintball howitzers, and alot more.
Heres a link to the site, Pinckney shouldnt be too far from the border of Michigan and Ohio.
http://exoticsportz.com/HELL-SURVIVORS/Tippmann.html