Have you looked at using SRM (http://www.vmware.com/products/site-recovery-manager/. This is a great application for DR and works amazingly well. Its simple to setup but does require extra expense with license costs.
I would recommend looking in to the above if you want to have a proper virtual DR solution.
Agreed with pauljawood, SRM is a product designed to do exactly what you want to accomplish.
Keep in mind though that you are going to need storage replication on array level (over WAN aparently). Ask the partner or vendor of your SAN on possibilities to replicate data from production site array to another array in DR site.