BTW, I myself is a Foundation user, mainly because of its better responsive design.
Can you tell me a little bit about why you prefer Foundation's responsive grid system over Bootstrap's? I just started using Foundation 3 for a personal project, but I picked it basically because it's developed on Sass and I already know and am comfortable with Sass.
Also, I'd love to know if anyone has any experience using Susy grid system on Sass and how it compares to Foundation and Bootstrap grid systems. I found Susy a little more difficult to get started with because their documentation isn't very good and because I don't yet have a good grasp on how to design for a responsive grid.