Finally, I don't think that the SS storage on a hybrid (or even a SSD) is dedicated to run the OS.
That's what was in the back of my mind. With a front-end SSD, with OS loaded on it, seems the best plan for being sure it has enough elbow room.
At this time I imagine MS office sharing the 125Gb partition, and working stuff in the other half to be moved to a HD when non active. There should be room for PhotoShop in the second partition with a few other high demand Apps.
The way I'm going, I might as well have kept the NAS drive.
