SSD and HDD. Raid 0 in many cases wont give you ANY performance increse.
Also raid 0 in hdds has a quite huge chance of failiure. You might think that 1 year is long till it will fail, but if you get lights out, or anything like that, chances of failure go up like hell.
Also once you have most of the start up progrmas on an SSD, the rest goes quite smooth.