read this for my opinion on hybrids.
i am of the opinion that, since laptops should never be primary storage, SSDs are always the better option. they're more durable to the dings and knocks that laptops often take, they're exceptionally fast, they generate little heat, and they last as long as the laptop if not more, whereas standard HDDs are expensive for the size, noisy, slow, and susceptible to most of the environmental issues that laptops are exposed to.
a 120gb Vertex 3 or Agility 3 or Enhanced Cronos is 85$. this is stupid cheap. buy that instead. my desktop primary is a 120gb SSD, and not only does it boot W7 cold in 30s, i've got six games (including two MMOs) on it and don't have issues with space or loading times. get an external for heavy storage.