Cisco WAN :: 819 - Upgrade And Add Comm To Remote Site?

I'm working on a project to upgrade and add comm to a remote site.  We are going to add a 900 Mhz ethernet radio to send data to a permanent site.  We also plan on adding another ethernet radio to shoot to another permanent site as a backup path.  Both permanent sites are on different subnets so I figure I'll need a router at the remote site.  I was told on that the Cisco 819 hardened version would probably work but after looking at the specs I'm not so sure. At this time speed isn't a big issue but in the future this remote site may be a backup path for the other permanent sites as they are both spurs off the main microwave network in this area.