Sure...the only thing terminating on the router will be an ethernet 100Mbps connection from the ISP who will be doing the EoS. Also, no layer 2 features. The router will only act as an edge router providing Internet access. I was looking at a 3845 but wanted to get a second opinion. Thanks.

If you only have the FE from the SP and only Internet traffic then the 3845 should be OK, overkill even. You may look into any security features you may need. Some folks have used a port on a 6500 and set up a VLAN for Internet traffic. You may even be able to set up redundant 6500 ports and use HSRP. Just some general thoughts for a somewhat vague EoS/MetroE solution.

Yes - that's exactly the case. I plan to have a firewall in between this router and the internal network. Thanks for your input.