Price Comparison website design with datafeedfile

We need a PHP professional programmer to create a professional design website like price grabber dot com & retailmenot dot com . The website will have price comparison + coupon section You can offer your own idea on what would be the best for the project, offer a plan and we can work from there the changes. Some things we're looking out for are: - pleasant and professional designed themes, logos, banners. -Layout should enable easy reading, enough space for content and advertisement space for google ads and banners -Appearance and layout should be easily changeable, (like applying themes). -No complicated skinning feature needed, but might offer winner another paid job at customizing appearances in future. -ability to utilize datafeeds from [login to view URL] (for price comparisons, coupons etc) , For more information, please read more at [login to view URL], it is a very easy to use and it will generate the page with a 1 line code. [login to view URL] & [login to view URL] -Colour of text and links should be easily changeable without coding HTML or knowing CSS. -Places to put ads or custom featured content. -Navigation Makes sense and user friendly -SEO Optimized to achieve top rankings in major search engine Google, MSN, Yahoo , and submitted to major search engines, google, msn, yahoo etc.. -Twitter Integration (Feel free to suggest what we can do here) -Visitors able to sign up and log in -Double-opt in feature -Logged in users able to customize their favorite stores etc, change their stores that would like to receive email alerts from, tell a friend about a deal/coupon (email will appear from their email with their name). -Search function, -Starting Date field for every coupon -Expiry Date for every coupon -Expired coupons "Greyed out" when displayed. -5 professional designed promotional banners to promote this site for google adwords -Able to sort expired coupons in CMS and option to delete them -Price comparison section design will be similar to price grabber with categories section -Able to write articles for featured deals/coupons -Have good SEO for these titles ([login to view URL]) URLs -Easy adding of coupons, articles and images. -Cross browser compatibility, compatible to IE, Firefox -newsletter signup for members -Comment area for logged in users to comment on article/coupon, no hyperlinking in comments for users, but able to do that for admin. -affiliate link cloaking, but at the same time URL that is SEO and human friendly. -system to show coupon code only after visitor has clicked on link to merchant page. (Pop-ups are not preferred as they can be blocked and makes site unusable. Maybe AJAX?) -area for instructions on how to use coupon etc -integrated forum for discussions (using open source e.g. phpbb ok) -contact us page (using php_post, capchta for anti-spam) -auto generated sitemap -auto generated rss -all page contents must be completed, including about me page, etc. -Provide training to the new site and I will be able to maintain or edit the site later on -This is a complete website project for professional with knowledge of Php Programming and website design skill. Coupon section Categorize -By Store -By Category -By Printable Coupons -By Online Coupons -By __ Days Till Expiry -By Expire Today etc Anything constructive ideas, useful features to have are appreciated.