We had a particularly bad experience with View after a vCenter Server change, so I may overly paranoid, but I would strongly recommend opening a support case with VMware before making the change. I believe that the VMs (and ESX hosts for that matter) are registered with vCenter and that "registration" information is in the View database, so it's vital that this information is not changed in vCenter. If it is changed, the pointers in the View database will not be updated and you'll have big problems. I suspect that as long as you point your new vCenter instance to your existing vCenter database, all will be fine, but I would just make sure with support before doing it. Best of luck.
