At one time, I had a Intel X25-M SSD. It worked well, but I needed more space, so I bought a second.
I really wanted a 160gb single image for the "C" drive, so I combined the two in raid-0.
It worked well, but I could not detect any improvement in my user experience.
Later, I used the 80gb drives in other PC's and replaced them with a single X25-M 160gb drive, and performance was equal, if not better.
Raid-0 will give you impressive synthetic benchmarks, but don't bother.
The Samsung 850 evo will be a much better performer.