Online Store

We want to build a website for e-commerce. We plan to have deals, promotions and combos which I can offer to customers. The website design and branding is very important, the function of the site should be very fixable, so I can create special offers, daily deals, happy hours, selected products, Also, I plan to manage my inventory and a back office application using which I can add/ manage products in the store. Also, using the back office application, I should be able to associate various tags to the products and various content of my website so that we can search for them using those tags using the search feature. Highly preferred using magneto The Application should act as ERP where I can create invoices build add my expense, and operation cost, inventory etc. Also, I plan to manage the shipping and handling information of my website. I also need a good logo and slogin for with website with complete branding for example (icons, categories, copywriter, them for social networking FB and Twitter) and good and appealing website layout complying with web 2.0 standards. Include browser compatibility with smartphones and tablets. I also plan to keep the search engine optimization in mind while developing the website. I would love to have suggestions in this regards. The bidder should contact me with any messenger for more details and to clear for me his idea and concept.