Magento Ecommerce customization

I have an Ecommerce website that I have designed a mockup for and I would like someone to code it for Magento ecommerce.? The look must follow the mockup completely. I don't want the functions to look just like the default ones that? come with? magento when you install? it. So there will need to be some changes made to the checkout areas and stuff like? that. ? Please only bid if you have? experience with? magento!!! Please send links? of any magento sites you have done. Also estimate? how long it would take to complete. The sop will only have about 10 items.?