Glushing......Hows it goin mate!
With your current toy list.......I'm going to assume you have a desktop drive for backup/clone purposes, if you don't, buy one!......and two, you don't have a UPS!
If I had this list I would put the 2x1TB drives on the ICH10R and raid1 them for the OS ..... using your OS is more reads then writes, so with raid1 reads are almost as fast as raid0.........this will also give you parity of your "C" drive in case of drive failure and or blackouts and brownouts.
Put the other 2 drives also on the ICH10R and raid0..........this will give you 4TB of storage, fast reads and writes for accessing storage and even programs if you wish to install some there as well........optical on Marvell controller.........on this board forget about Marvell for storage at the moment........ICH10 will out perform it every time!
In your situation I'd leave the XHD out of the equation.......once raid1 OS and 0 storage has been loaded and tweaked .....set to ACHI in bios for best performance and enjoy
Aussie Allan