Cisco WAN :: 2911 With Multiple Internet Connections?

Jun 20, 2012

We are about to install a cisco 2911 router to replace a linux based router.
 
The Cisco will have 5 gig ports, 4 ports connected to DSL modems each modem connected to a different ISP, and the last port connected to a Cisco LAN switch.
 
802.1q will be used on the internal router port to split the LAN segments up into VLAN's as the building contains lots of different businesses.
 
Each customer in the building has there own servers and set of public IP addresses assigned e.g
 
Customer A - ISP 1      uses  81.34.65.78 NAT'd to 10.0.0.1 Vlan 5 port 25 (SMTP)
Customer B - ISP 2     uses 217.23.67.87 NAT'd to 192.168.1.1 Vlan 6 port 25 (SMTP)
 
and so on
 
The outbound traffic also needs to go out of the correct DSL line which ever has been assigned to that customer.
 
Am i right in thinking the only way to do this will be to use "Route Maps" ?? 
 
(IP addresses above are made up, or at least not ours)

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!
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[code]...

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