I am currently using Microsoft ISA Server 2006 as my firewall and proxy on a dedicated server.
Support of it expired and I need to look for a new solution. There is no need for an ISA server on my network. I kept it more as a hobby. I am looking for a good dedicated firewall device with firewall and proxy functionality. Not sure yet if I want AV built in or if it is actually useful. A Microsoft Forefront appliance is going to be overkill and expensive. What kind of devices should I look at? Zykel, Watchguard, Sonicwall? How will devices compare to my current setup in terms of security and performance?