(refer to attachment for network diagram)
You want to send an EIGRP default-route to remote sites (preferably using a distribute-list from the main site hub router) to shrink the routing tables at the remotes. You have a main site with remote branches connected as EIGRP stubs. The remote sites are connected via P2P T-1's. The remote sites connect to a hub router at the main site. In addition at the remote sites you have a DSL connection available as a backup link in case the T-1's go down. At the main site you have a routing being used only to terminate the DMVPN connections of the remotes.
Since the remote sites all have 2 conenctions to the main site (T-1 and DMVPN backup DSL) what would the best solution to send the default route to the remotes and also have the T-1's as being the "successors" while the backup DSL will be the "fe successors?