ENDIAN Firewall - New network setup input

Hello,

I am here to be told Iam crazzy and out of my mind or i am crazzy and it is going to take some time and mind power to do. I am really not expecting any one saying it is going to be easy.

But i have gotten to the point of being fed up with Fortigate.

Here is my goal, I would like to run two boxes both running two VM instances. One box as the active one then the second as a failover.
We have two dedicated lines coming in, One is for customers only and one is for the company.

Now i am planning on running Pfsense in front of Endian to run IDS,QOS,and DHCP.

The Endian box will then be setup as a router and UTM.

The attachment is a small diagram i made to try and get grasp on what i am trying to accomplish. The main area i am stuck at is the bridging the Endain server to the pfsenes. I have to keep both dedicated links pretty much separate the whole time.

My second thought is just building a second box and running the dedicated line for the customers threw it running Endian, but i rather only have two boxes not 3 to 4.

Thanks
Nick Portello