107062 ecommerce web site needed

Our existing ecommerce web site needs to be re-done to make it more reliable and customer friendly. We sell greeting cards online and offer a variety of personalized options for each card design. This includes envelope color, ink color, quantity, preprinted or regular envelopes, standard or alternate verses, customer verses and personalized copy which the customer can type in and see the result in a preview, logos, signatures, etc. We offer a selection of fonts and sizes for inputting the copy. Please look at our current site--www.ceocards.com--and review it in detail. It needs to be totally redesigned to accomodate non-holiday cards. More importantly, it needs to have far greater reliability. Problems we have had this first season include not being able to see what the client has put in, jumbled copy, someone else's name appearing at checkout, no charges for chargeable items, etc. The site needs to handle accurate shipping charges by weight and zip code and handle credit card payment. We also need a content managment capability so we can add or take away card designs and SEO. We are aware that it may be difficult to quote at this point, but we seek someone who can demonstrate proven capability in this area and we will work out the details of cost and timing. If you can provide a rough budgetary cost that would be helpful. Thanks, and I look forward to your response.