Which gateway solution to choose?

Hi All,

We are in the process of reviewing our entire Security Gateway (3 Gateway Point)

We are trying to replace MailMarshal and N2H2 with a hardware base solution

Issues on

Primary

Email Filtering (Anti-Virus, Spam, Reporting etc)
Web Filtering
Hardware Base

Secondary

A Firewall, IDS, Proxy, NAC or a VPN included would be a bonus.

Below are the two products that we are reviewing at the moment

1. Sophos Enterprise Security  & Control

Sophos PureMessage for Notes/Domino ES1000 (Hardware)
Sophos Web Application WS1000 (Hardware)
Sophos Integrated Network Access Control (NAC)
Sophos Enterprise Anti-virus  &  Client Firewall ( We are already using this product)

2. Smoothwall (Hardware)

Firewall
Web content Filtering
Email Security
VPN Gateway
Intrusion Detection (IDS)
Internal Firewall
Load Balancer
 
Please keep in mind with budget cost since the Sophos product is great, but it will cost us over $40K, where compare with SmoothWall $15K est

I would like to know from people's opinion on the products above, such as is advantages, disadvantages they've come across or any other products they can recommend as well.

Cheers