Hi, we're in the process of upgrading our network and looking for a firewall device. Behind the firewall will be a: mail/internet server, VPN server (75 concurrent users), video conferencing unit, 100 user LAN. I've checked out the Sonicwall 2040, 3060, Watchguard Firebox x700, and Cisco Pix 515e. We would like all to be accessed through 1 T1 circuit but would consider a second if needed. Has anyone had any experience with these products and can make a recommendation?