The environment is virtual servers in a remote data center(cloud, I guess) with a 30Mbs pipe to a fully meshed MPLS WAN with 20 T1 lines to branch locations. All routers are older Cisco 2811 10/100 routers. There is a mixture of older CLI 10/100 thin clients and 10/100 PCs. Aside from terminal services issues, application issues, and a 32-bit environment, what are the reasons to upgrade the routers? What are the questions to ask?