What kind of building are we talking about? I lean toward conduit every time, even if it costs more up front. In an office or a school, that clean look matters, but surface mount stuff just gets wrecked. Someone bumps it with a cart, or you need to add a new line next year and it turns into a total hack job. Buried conduit might be a pain to pull through later, but at least the path is there and the walls stay clean.
Totally get where you're coming from. In my experience, conduit does save headaches down the line, especially in high-traffic areas. But how do you handle it when the building has existing surface mount that's already a mess? Do you rip it all out, or work around it?