PPC's true strengths are its speed and expansiveness. With a PPC campaign, you can be on the first page for a multitude of targeted terms within a day. However, the terms can cost anywhere from pennies to many dollars per click; also, for a PPC campaign to be done correctly, it's usually best to hire a firm that can manage it full time.
However, when it comes to the long term lifeline of your internet marketing, the result is clear - SEO offers the better value in search marketing. You won't rank 1 overnight, but SEO is more affordable and the longterm benefits have been proven. All of these facts demonstrate that your company should spend more of its time and resources focusing SEO.