Cisco ASR router performance specs

Hi all, Could you point me into the right direction, please, on where one would find different performance ratings for Cisco routers other than talking to my SE (who is on PTO right now). My understanding is that Cisco does not publish this info. How do folks research that kind of stuff? For example, right now I want to find out how many DMVPN tunnels a given model of an ASR will support and what kind of throughput I can count on with that enabled. Thanks in advance for answers --Andrey