I’m a huge fan of the Genesis Framework – a WordPress theme by StudioPress™ / Copyblogger Media LLC. This website in fact runs on Genesis and uses the child theme, Generate. Child themes are amazing, as they don’t cause you to have to modify your parent theme. In fact, there are plug-ins available for free that let you adjust every aspect of your design without even damaging your child theme. These essentially create new style sheets and rules that are interpreted by the theme for display. The best option below is the Pro Plus Package, as it comes with Genesis, most of the child themes below, and lifetime updates and support. At first I bought just Genesis and a child theme, then another, then decided that I needed to go for it.