I have been going through some IPv6 book chapters and doing IPv6 RFC review and there are a few that I think are of interest to add to your short list - if you keep one for IPv6. If not, there is a pretty comprehensive list at http://www.ipv6now.com.au/RFC.php
First up is RFC 6540 which is titled "IPv6 Support Required for All IP-Capable Nodes" and can be found at http://tools.ietf.org/html/rfc6540
Second up is RFC 6877 which is titled "464XLAT: Combination of Stateful and Stateless Translation" http://tools.ietf.org/html/rfc6877
Third is RFC 6866 which is titled "Problem Statement for Renumbering IPv6 Hosts with Static Addresses in Enterprise Network" http://tools.ietf.org/html/rfc6866
Fourth is RFC 6853 which is titled "DHCPv6 Redundancy Deployment Considerations" http://tools.ietf.org/html/rfc6853
Finally, you really need to keep RFC 6724 handy to understand how your OS is selecting a default IPv6 address to use, it is titled "Default Address Selection for Internet Protocol Version 6 (IPv6)" http://tools.ietf.org/html/rfc6724
Hope these are useful. There are a lot more IPv6 RFC's that have been published recently, mainly around mobile operators and their need requirements but it is nice seeing a lot of work happening to keep the IPv6 bandwagon moving forward.