A couple of alternatives that I know of first hand and selected to resell.
Astaro Security Linux. (www.astaro.com) Can be purchased as an appliance or loaded onto a black box. Provides VPN, IDS/IPs, FW, Anti-Virus, Spam and Content filters, etc. I think the retail on it was about $2,600 or so for a black box installation.
eSoft’s InstaGate xSP (www.esoft.com). Firewall/VPN appliance. Starts around $1,400 and ends around $2,200 depending on if you need WAN interfaces or if you will put it behind the Internet router. It could be the Internet connection from your provider and drop into your LAN from the Ethernet side.