Suffusion is a great theme all around. I've used many different WordPress themes, and Suffusion is a really easy recommendation to make. The amount of customisation options are plentiful, you'd be able to alter many components of your site easily.
Another neat feature of the theme is the 'query post' widget, I use it to generate random posts on my sidebar, to allow my visitors to discover content that they might not have seen before.
The best thing I like about Suffusion is that it's really functional. Its not a fanciful and artsy looking theme, instead, its like the workhorse of WordPress theme.
You should use this theme if you're looking for something highly configurable, neat, and functional.