Closed loops are more a thing of the past I would think. Especially if you already have vortecs. There is no drilling, no possible leaks, less power, more flow options, ease of maintainance, ect.
I like the clean look of the vortecs vs. any other pump or closed loop out there. Although I will probably be using 2 vortecs and 2 tunze's on my new tank, just because the vortecs can't be angled and it is a 6ft tank. On a 4ft I would use two-three and be very happy with the flow. Especially with the options available on the ecosmart ones.