On the new iMac 27. I'm planning to set up a raid0 configuration with two ssd drives. So I have two options in mind: Option 1: Order the iMac with the standard 1TB hdd and buying from OWC both ssd drives. This seems complicated and expensive because the only ssd with msata connection in OWC is the 480gb model, and I just need 128gb. Option 2: Order the fusion drive 1tb, disabling the logical volume, and install an OWC 128gb ssd in the place where the HDD is. Then make the raid0 with Disk Utility from a usb drive with MountainLion installer on it, and install the OS on the new fancy raid0, getting speeds up to 900MB/s. Do you think having two different ssd (Samsung 128gb and OWC 120gb) in raid0 would cause me any performance troubles? Do they need to be the same size and brand to perform best?