Please see this example:
I use Source Code Pro for my website as main font. While I like the look and feel of the font and I chose it specifically for that, I have the impression, that it does not work very well for the average reader. I definitely want to keep it for my headlines and menus, but I would like to choose a different font for the blog posts content. I was experimenting with different fonts, but nothing really struck me which one could be awesome for it. I was trying Source Sans Pro, but it was too narrow compared to the headlines.
What am I looking for when I am choosing fonts for readable text and what font could possibly compliment Source Code Pro best?