Netgear ProSecure UTM Series (http://www.prosecure.netgear.com)
A comprehensive all-in-one gateway security solution. The ProSecure UTM combines application proxy firewall, VPN, zero day protection, anti-virus, anti-spyware, anti-spam, intrusion prevention, and URL filtering for total protection.
ProSecure Unified Threat Management (UTM) appliances combine performance with comprehensive security coverage for small businesses. The flexible modular software design architecture leverages patent-pending Stream Scanning technology to scan files and data streams up to 5x faster than conventional methods. This architecture in turn enables ProSecure UTM to utilize virus and malware threat databases from NETGEAR and Sophos that are over a million signatures in size – up to 400x more comprehensive than legacy small business UTM platforms
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My Two Cents: I have been very happy with the Netgear ProSecure UTM50. I replaced a Mikrotik RouterBoard with the UTM50 and attached it to two Core Routers. Unified Threat Management with in hardware systems is the way to go these days even at data centers, based on what your mission is. The price is reasonable, and most come with a 3 year (UTM) subscription.