Use of the Zone interface

We have a project to replace a Cisco ASA with a Foritgate 201E. The current ASA has a port connecting to a 1Gig unmanged switch supporting the servers, and then connecting to a Cisco 4500 switch.

We will be using the first two ports in aggregate mode to connect to the Cisco 4500 for more throughput. We want to use the remaining 8 ports to replace the 1gig unmanaged switch. 

Would it make sense to setup a Zone with the remaining physical ports 3 through 10, to emulate the unmanaged switch and provide connections to the servers? I understand the concept of Zones, but have not used them in the past. A vswitch does not appear to provide the result we are looking for. 

What are you opinions?