I purchased an ASA 5510 VPN Edition to replace my Cisco VPN 3005 concentrator. I currently have a Cisco PIX firewall. Looking through the ASA it looks like I can setup this box to be used as a VPN and the firewall. Is this a good idea? My PIX is over 7 years old and probably should be replaced. Should I purchase an additional box, or use one for both? I currently have a windows 2003 network with approximately 170 users, connection to the internet is two T1s.