Raptor is for OS + related stuff (aka disk cache). The samsung is for flightsim & co
Interesting, I am also busy with a new setup but have it just the other way around, V-Raptor for FSX and 7200rpm drive for everything else.
Since FSX is the most demanding application, it seems logical to put it on the fastest disk. Alternatively: OS on small SDD drive, FSX on V-raptor and the rest on standard HDD. Off course in a few years SDD might be best for everything but isn't affordable right now (at least for me)