What is the most secure router for a home?

[IceDigger]

I am looking for a new router since my linksys 8 port router/switch died. I am looking for one with the tightest firewall possible under $300. Any suggestions?

Reason for needed security is my home based business files are on one of my linux machines connected to the router and want it to have access to the internet but I need it secure.

 

[Blitzrommel]

Sonicwalls aren't bad, Fireboxes aren't either. Snapgear has a special place in my heart for some reason.

By definition, the most secure router is one not connected to teh intarweb.