Small Business Router

Hello,

I am looking for a router that would allow me to assign a different external ip address to different internal machines. We have 5 static ip addresses and I would like static ip address1 to go to OWA access for instance and static ip address2 to go to say a development machine. Is there any good routers out there that would allow this at an affordable price for a small business.

I would appreciate any suggestions for good security practices in this type of implementation also. What should I be aware of? what should I do? What shouldn't I do?

Thank you