Vista - Hyper-V and Physical RAID

Hi,

I am building a box. I was going to do the following:
Disk 1) RAID 1
Disk 2) RAID 5
Disk 3) RAID 1
Disk 4) RAID 10

I am going to install the Hyper-V parent on Disk 1. The first child server
partition will be the SBS 2008 Premium primary server, and the second will
be the secondary server for SQL. Main point here is that Exchange is on
one, and SQL is on the other. Both Exchange and SQL use DB's which are
split into db files and transaction logs. "Best practice" dictates that you
store db files and transaction logs on separate physical hard disks. In
keeping with this recommendation I wanted to map the VHDs to physical disks
that support this type of configuration.

Is this possible? If it isn't impossible are there any other problems here
with what I am looking to do? Am I being old-fashioned here and would be
better off just getting one massive RAID 5?

TIA,

Jarryd