The rationale for the Zips is based on using a mechanical fan, thus raising the center of the pump where the fan is mounted higher on the radiator. If you're still going to run the electric fan the Zips won't offer an improvement assuming the pumping rate is the same as your existing pump.

Since you've got both a condenser and a 4 core radiator you've got quite a path for air to travel. At highway speed there may be enough ram effect to accomplish sufficient air flow, but the fan has a real job to do without the ram effect. A shroud could improve the flow as it will draw through the entire surface, not just where the fan sits. The Cobra may actually do a better job for you as there is one less row of tubes for the air to navigate through. It sounds counter intuitive, but you need the air flow to carry away heat just as much as you need surface area to expose that heat.