Not sure really. Like the previous poster, most people these days say contents trumps PR. Good PR often follows good content though and a site with good content and ranking may have a higher PR than is yet visible on the Google toolbar. If I search for my main keywords, the average PR of the sites on page 1 in Google is higher than page 2, 2 is higher than 3 and so on but within a smaller window, but within each window of 10 sometimes lower PR sites are higher.
Links back to your page with the right link text (matching variations of your title, description, H1 tags, and content) is what has the most impact on your SERPs. PR counts a lot less than it used to. Matt Cutts recently stated that they're a long way away from the original PR ranking algorithm.
pr means nothing, its like having a fancy car, people know you have money but dont know how you made it.
PR is still good to get but do not focus just on PR, at the end of the day you want traffic and return from your site. Focus on unique content, backward links with keyword link text, relevant backward links, keep your site updated and growing and find your niche market and build your site to it. Plenty of sites make money with low page rank, at times more than ones with higher PR.