I'm not sure if I completely understand your question, but as far as obtaining quality backlinks, link up with a site that's relevant to your article.
It shouldn't matter which article you choose, but you will probably only get one backlink from that one website to Hubpages usually. So you'll want to get a wide array of relevant sites.
Make your comments somewhat thought provoking, and don't beg people to look at your site. It can sound needy, and it annoys the readers. Plus, the blog owner may have his comments moderated.
Here's a pretty good blog post from a site talking about proper commenting: http://www.mastersofseo.com/comment-blog/