Help required: Basic router which allow routing protocols

[sfour]

I have this scenario :


I have a dedicated leased line and my internal network has a device which we want to have a public IP and also few ports to be opened for external customers to be able to access from outside(mostly US, we are from India)

I am checking with this "DI-804HV CABLE/DSL VPN ROUTER WITH IPSEC AND 4-PORT SWITCH" considering the cost ( below Rs. 5000?) Or is there any other router which can support the above issue ? Please suggest

Thanks in advance