SEO/Traffic Builder/Page Rank Increase - current PR 5 - need one-way links

This project is for a (PR5) coupons website specializing in printable (main category) and online coupons for various retailers, manufacturers and e-tailers. Long term relationship sought. Companies with proven track record will only be selected. Let's not waste both of our times if you are not qualified. Site is already #5/6 on Google on major keywords. Yahoo search is not yet where I want it to be. Google rank is PR5 (for main page only; no rank for other subpages); yahoo is not ranking/liking it. Traffic was excellent during holidays (over 1 mil unique visitors), but went down significantly in January. I need high PR, more traffic, quality one way non-reciprocal links. Here is description of what I am looking for - [login to view URL] I will provide you with traffic Alexa report - I would love to see better results in time. I will also provide you with detailed traffic report for December/January (will links, search engine numbers, etc). In short: my site is PR5 and I'd like to grow to PR6/7/8. I checked traffic on Alexa and the following sites have better traffic than mine: [login to view URL], [login to view URL], [login to view URL], [login to view URL], [login to view URL] and www.slickdeals.net. I especially would like to get traffic as FatWallet or SlickDeals gets - they didn't get as dramatic drop in January from December as I did. I am attaching some of my stats. I'd like to hear good ideas and how much it will cost. Payment on success only. I am on a budget ($100 to $300), but will pay bonus if project is to my expectations or higher. Thanks. .