@nathanmiller99Sep 11.2013 — #Both are important part and i am agree with you that google update the page rank after long interval but getting a backlink from a good PR page can be a good move for your site ranking.
@JessicacisOct 15.2013 — #you have to check page rank and off course relevancy too. But you must try to post on the websites which will give you the good traffic as getting backlink from the high PR is not big deal but traffic more important as it will give you more and more conversions. I can give you the example check its alexa and PR- enfuzed.com/
@priyanka444Oct 16.2013 — #back links are necessary for a website. i always check for high PR and reputed back links by which the website get more traffic as well as page rank. so always prefer branded sites to get the back links.