All, attached is my current topology. Keep in mind that the EDGE RTRs are not the internet routers and OSPF is the routing protocol. I'm looking for feedback on this, I want to deploy Multicast with PIM Sparse Dense Mode.
EDGE RTRs - Anycast w/Auto RP MSDP(or should the CORE SWs be configured instead of EDGE RTRs?)
CORE or DSTR - Auto RP mapping Agents
ACCESS - IGMP Snooping
EDGE - 7606
CORE - 6506
DSTR/ACCESS - 3750