Looking for a recommendation on a setup

Hello, Looking for a recommendation on a setup? We are trying to replace a cisco router that we cant log into anymore. the site has 2 wans with 2 more coming soon. 1 wan is 1gb and the other is a 2gb with the other two being 2gb we hope(they are setting them up). The wans go into a switch and get vlans (510-540) to the router (40gb fiber port). The router has 6 vlans that will come out of two ports (both are 10gb ports for fail over) going to the switches. that way if one switch goes out the other one keeps working. what is the best way to set this up. if it helps it is a virtual router.
network layout.png

No need to start another thread, the diagram and discussion to date are located here…
http://forum.mikrotik.com/t/routing-between-vlans/151828/7