We currently have a software firewall running on our windows web server. The server is co-located. Our traffic and business continues to grow, so we are thinking the next logical step would be a hardware device to handle router/switch functionality as well as firewall functionality. We are also adding another server to the mix which is why I need the router/switch functionality.

We currently serve up roughly - 20gb per day - 15,000 visits per day - 500,000 pages - 4,500,000 hits - max of 500 concurrent connections. We expect to double or triple these numbers in the coming year.

I am looking for recommendations on a device that will:

1. Handle this load and growth.
2. Have Intrusion Detection and (Anti-Virus as it relates to web only - I dont need Email tpye of functionality here).
3. Be more geared towards web serving than general network.

Thanks for you thoughts.