Well that's the thing. Generally I would use it for Office, web, multimedia. But I am a biochemist and depending on what direction my research goes in, I could be doing somewhat more CPU intensive tasks (but nothing like CAD design, etc).
Which is why I ask what the actual technical limitations of the dual i7 are. I don't want one if it is only a higher clocked i5. Your reply is exactly what I have been debating and I guess I am looking for some/any piece of new information that would push me in one direction or the other.