Actually win8 and 10 can do a windows raid, without any performance lost over motherbd raid (which is really software raid anyways). You might not need to make any changes at all using Storage Spaces.
Win8 & 10 dont give the user an easy option for raid 10, just 0, 1, & 5. You have to create a raid 10 manually.
First backup all the data that's on the drives then delete any existing partitions on them,
Enter Storage spaces and create two raid1 arrays (might be called a two way mirror).
Enter Disk management (run diskmgmt.msc) and delete the partitions on the raid 1's
Right click on one of the raid1's unallocated spaced and create a new stripped volume using the other raid1 as the 'other' drive. You will get a pop up window asking for which 'other' drive to use in the stripe set in case that was confusing.
Windows will want you to format it, I use NTFS, and then give it a name. It will take some time to format the large space.
Now when its finally done you can copy your data back in