We have an environment that:

Contains physical servers: 120 Win2k8, 85 Linux server, 100 SUN Solaris.

We have a current Data Center, and we are planning to switch over to a new Data Center that is physically apart by 500KM.

I/O rate of their applications 1800 IO per second with average size 8KB; ISP can give a bandwidth of 2000 IO per second @8KB per channel.

We want to plan for a DR Solution between the two sites?

We are planning to virtualize our servers and use ESXi 4?

We want to implement a Replication solution that meets RPO of some minutes?

Any Advices or recommendations are welcome