Currently my office has a Cisco ASA 5505. We are in the process of looking to upgrade firewalls. I've heard great things about Sonicwall and Watchguard. Can you please suggest comparable models in Cisco, Sonicwall, and Watchguard? Right now we just do some simple static rules and we have a few remote VPN phones that link in to our phone system. Ease of use is a HUGE plus.