I would like to share the knowledge I gianed to get the ASR 1K Box to box HA with ZBFW working in a WAN to LAN topology. We worked with Cisco (from TAC to DE's) as we were one of the first rolling this out. In the process we defined an alerternative design and uncovered a bug.
Hope this helps...
http://tech13.com/blog/2013/3/13/asr
