I am not an SE but from some quick skimming of branch office routers it appears that a 886 ISR will provide what you need.
Here is the link: http://cisco.com/en/US/products/ps9564/index.html
Integrate Access, Wireless, and Security
Integrate Internet access over ADSL2/2+, security, and wireless services onto a single, highly secure device. The Cisco 886 Integrated Services Router offers broadband speeds and simplified management to small businesses, enterprise small branches, and teleworkers.
The Cisco 886 Integrated Services Router provides:
- Firewall
- Content filtering
- VPNs and WLANs at broadband speeds
- Easy deployment
- Centralized management features
Customize Your Router Services
Available options on the Cisco 886 Integrated Services Router include:
- Built-in advanced security, including intrusion prevention, Group Encrypted Transport VPN, and Dynamic Multipoint VPN (DMVPN)
- Up to 20 VPN tunnels
- ADSL2/2+ over ISDN support
- WAN connection with multiple access options
- Business continuity with primary and backup connections, including third-generation wireless and ISDN
- Four 10/100 Mbps Fast Ethernet managed switch ports with optional Power over Ethernet (PoE) on two switch ports
- Integrated access points based on the IEEE 802.11n standard, using MIMO (multiple-input, multiple-output) to improve coverage for existing and new clients
- Cisco Unified Wireless LAN Management
Cisco Configuration Professional software also helps to simplify management, and a universal software image allows you to easily expand with software activation.
However, I do agree with Paolo on his recommendation.
