Infrastructure requirement for builind DR using SRM

Hi all,

I just have some experiences in install, configure, manage in ESXi hosts and vCenter (version 5.x)

Now My customer want to build DR site and want to implement SRM.

So I hope someone can guide me out about my following secnario.

I would like to know what are requirements for building DR site using SRM. ThePorduction site has

15 ESXi hosts  (5.0 u1) in different clusters, but in same Data Center ( 3 clusters, each have 5 hosts)

1 vCenter 5 as a virtual machine. (Enterpirse Plus)

1 SAN storage EMC VNX5300

IThere are about 80 VMs to be replicated between Production site and DR site.

DR site is totally new and so nothing there. So here are my questions:

1. What are the network requirements (What should I do with network team? )
   
2. What are the storage requirements ( Can I use different Storage from different vendor? )
   
3. What are the Host requriement ( How many hosts do I need? )
   
4. Should I use array based replication or vSphere replication?
   
5. How many vCenter Servers do I need?
   
6. Do I need sepearte vCenter Servers for SRM?
   

Thanks in advanced,

Thu Ya