Great suggestions guys! I'll have to wait until I decide on a case before I make a decision.
i know case choice is personal, but i want to state that the case should have at least 160-165mm clearance (or higher if you use noctua nh u14s).
if you don't use all the 3.5" hdd bays, try getting a case with removable/resizable drive cages. it might increase case price, though. another thing about the drive bays is that if the hdds are held in vertical orientation instead of typical horizontal orientation, it'll impede airflow from the front.