Multicast Options

Hi,

I have Cisco Nexus switches all over my WAN, and a very basic multicast config.

I currently use a loopback as the RP, and use prefix lists for the multicast IPs.

Only on one device

 interface loopback0 ip address 10.55.0.1/32 

On all devices

 ip pim rp-address 10.55.0.1 prefix-list MCAST-55 ip prefix-list MCAST-55 seq 5 permit 239.55.0.0/16 

It all works fine, but I would like to improve it.

1. I want to make the RP redundant, I think BSR is the way to go?
2. I'd also like to not have to update the prefix list on every device across the WAN, is that possible?

Any suggestions or recommendations are appreciated. Thanks.