Look up the Cisco phone number near you. CALL THEM.
Again, if I was unclear -> Pick up the phone and call them. They have people standing by to answer this question.
Currently we are using dynamic IP address. We are investing on static IP address and a firewall device to do VPN, disallow unnecessary traffic from WAN to LAN, and etc. Our branch in China also has static IP address, so we thought we can make a tunnel or something like that, rather than using VPN Client now. In the future, there maybe another office at another area, so there's a possibility that we have to VPN 2 places at the same time.
My manager is only interested in Cisco firewall because at China we are also using Cisco. So, 1 company suggested us using the Cisco Pix 515E - DMZ Bundle (Chassis, restricted software, 3FE ports). They say that that is the cheapest Cisco model we can get that can provide the functions we need. They mentioned about 3 don't know what ports or what which I don't really understand.
Anyway, is this true? Need more information?