Wordpress for portfolio sites?



I'm looking at doing a portfolio website for my graphic design/photography. Due to my limitied knowledge of XHTML/CSS I am thinking about buying a premium Wordpress theme for about $40 from ThemeForest. Is this frowned upon? I thought it would be best to have an original website showing off my design skills but this may proove to be a hard task with very basic XHTML/CSS hence the thought of wordpress. What are peoples view on this?

Also, another question - for anyone that has a blog on their portfolio website. What sort of content do you write on it - and how often do you update it?

Thanks, Ben.