Hi! I've seen your requirements, I m interested in developing it, I have highest reviews for jQuery (frontend) at freelancer.com and have good completion rate, and expertise in developing responsive templates based on HTML5, CSS3, Client side(JQuery Prototype) and PHP(cakephp,CI,Zend) for Server side.
can u explain this comparison tool bit more, I understand the words but need more explanation, some visuals will help too
let me know if u r interested in my bid, I'll let u know the cost and time, my bid will be reasonable.