As I may have mentioned I've put an SSD in my Vaio.
That, and a reload make it sparkle. I'd hate to go back to a HD unless it was a good quality one and substantially faster. But on the other hand I don't want to feel continually threatened by all these sub-sub-micron thingies fusing.
I'm not sure about pro drives for laptops. Do the top spec ones have faster more reliable HD's?