Quality is more important for several different reasons, especially for a blog or news website. However, you need to be producing quality constantly. I remember when I first started out my football blog I posted more than 5 articles a day with little detail, this gained little hits and eventually I began to post less but with more detail and as a result I gained loyal visitors who began to come back. With quality content you keep readers interested and will return (which should be your primary target).

So you really should aim for quality over quantity, but also producing a constant amount of quality work will help search engine spiders to index your pages. I recommend you use digg as well when submitting articles to promote your articles.