Dude.. Ahh Now you changed your mind about Mid tower... Mid tower is capable with ATX board if you had one, then not need a new mATX board.
Best MidTower : Corsair 300R
COOLMASTER Storm enforcer
In Case - My advice: You getting both mATX case and uATX board, no regret at all...
Yes thanks. I thought about and it and just want a mid tower instead. So I dont have to swap boards