Vista - HyperV configuration with iSCSI. VHD, Pass through or Virtual iSCS

i can't find any documentation about this anywhere. which one of these
performs better with hyper v?

let's assume:
i have a HYPER-V dedicated server with 2 nic card, and a iSCSI storage.
1 NIC is dedicated for iSCSI connection and 1 NIC is dedicated for Virtual
Network.

Here is a possible configuration:

1. allocate disk space from my iSCSI storage to a HYPER-v server host, and
share that disk space with a VM by means of VHD

2. allocate disk space from my iSCSI storage to a HYPER-v server host. Make
the disk offline, and use that as pass through disk for a VM. this of course
will make snapshot not to work from the Host.

3. share the physical NIC dedicated for iSCSI connection with a VM, and let
the VM access the iSCSI storage directly. I'm not even sure if i can share
iSCSI network in hyperv.

has anyone done this before?
I'm currently using approach #1. there are still a lot of question like
where to install the guess os(in the DAS disks or in the SAN disks?), and i'm
still testing all those.

any comment or suggestion would be much appreciated.