Hi Tony,
In my personal opinion, no. The benefit gained from article marketing directories are minimal anyway, and they just put you on potentially dodgy ground for the future. Instead of investing time and effort producing fairly low quality content for these kind of platforms, spend your time producing high quality, unique content and promoting it, and allow that to do the link-building for you.
The content marketing strategy will not only ensure that you have something of real value on your site, but it is a much more viable long-term strategy and far more secured against future algorithm updates.
I understand the temptation to opt for the easier link-building routes, but honestly you're far better served putting in the effort and producing something of real value and quality and using that as a conduit for link acquisition. I would always rather gain one strong, relevant and valuable link than gain a hundred low quality links with questionable relevancy.
If you need a hand getting started with content production, link-building and content promotion, I'd give these posts a read:
http://www.seomoz.org/blog/indepth-guide-to-content-creation-with-infographic
http://pointblankseo.com/link-building-strategies
http://www.seomoz.org/blog/the-noob-guide-to-link-building
http://www.seomoz.org/blog/getting-the-maximum-number-of-links-from-your-infographic
Hope that helps answer your question Tony - of course it's just my opinion, but it's the approach we use for our clients and we consistently see good results, so hopefully you can do the same for your website.