transporter.io Wireframe Grid

We are currently working on the grid and baseline rules for a one page marketing website.

I am playing with the type sizing, leading and line lengths for headers, running copy and secondary copy. With 465px wide columns and a geometric sans typeface, setting the short running copy to 17px/30px gives me an optimal line length of 60 characters per line.

Right now, I have the secondary value propositions set to center alignment but am started to think ragged right will improve readability.