YES, content is king but your HEADER
The header graphic/area of your blog is very important. I believe, among all else, that content is king.. but your header captures your readers attention and keeps them browsing down to your content. So yes, torn!
Being a Web Designer
and a blogger, I really feel that the very top of your website/blog is crucial. You can't count on your readers continuing on to your content. Wow them... capture them... with your fascinating header!