I am looking to advise a customer on networking 4 offices together. I have used the WRVS4400N for site to site VPNs before, and am quite impressed with the feature set on this router.... so much so, that I can't really find a reason to recommend the SR520 instead. I believe the customer has the money, and would be open to a superior option if we can make a good case for it, so my question is; what can the SR520 do that the WRVS4400N can not? Forget the next day replacement stuff; we could buy a standby WRVS4400N for the difference of upgrading just one to a SR520, so I don't see the value in that.
I was also curious about the routing capabilities of the UC500. Telephony features aside, how does the UC500 series function as a router? I see that the smart designs call for a SR520 to sit between the UC500 and the WAN. I can also understand that if you have a very busy network, that you may want to offload the security and routing functions to a dedicated device from a performance perspective. But lets say we have a small office that is not putting high demands on the network like this, will the UC500 function fine as a VPN endpoint, IPS, Router, and all of the other functions of an SR520, or is the UC500 missing something?
Would also like some figures on maximum throughput on each of these models if possible.