A diagram of the basic setup:
T1 connection (i.e. the internet you typically see on these diagrams)
router about 4-6 years old (sorry about the lack of brand/model, I'm writing this from offsite, and I don't have the info at hand)
fortigate 400 (used as a firewall, AV, etc.)
They are ready to replace the router. They like cisco.
The Q: Is there a cisco router that would be secure on the edge of the network, or do they need a router with firewall built in (potentially making at least some of the fortigate 400 capabilities redundant)?
Added info - there are about 150 employees. there is an exchange server and two web servers behind the fortigate, and they'd like to use the new fortigate SSL VPN.
Thanks for the help. Help with style is welcome - this is a first time post.