Advantages/disadvantages of a tunze stream vs closed loop

[bbhs23]

I am in the process of planning my new 315g tank. The dimensions are going to be 84x36x24. I am trying to decide whether or not I should use a Tunze stream system or a closed loop. Can someone tell me what some of the advantages and disadvantages are to using either. I figured that after buying the closed loop pumps, drilling, and plumbing the tank, its not going to be that much more expensive to get the Tunzes. Also, the power consumption is a lot less with the Tunzes. Is there anything else that I should consider?