Hi
Few Question,
1) What is your target audience?
2) Which products you are planning to sell.
3) Are there multiple categories and sub categories?
4) Would you like to have filter features to search products?
I'm a PHP expert worked on many sites in technologies like Magento, Corephp, wordpress, opencart, HTML5, responsive, website design, development, product management experience and also frameworks like Smarty, Yii, Cakephp, Code Ignitor etc.