Bigcommerce, Graphics, SEO, ECommerce

Hi there, I am a online computer reseller. Ive used bigcommerce for past two years. My web site is pretty plain, it needs a lot of graphics to create more atmosphere for customer to buy. I want my web site to look young, refreshing, solid, reliable, informative, simple to use. Also check on the workflow of ordering, whether its simple to use. Advise me how to upload product faster, also should I stick with bigcommerce in future and how to migrate?.. At the meantime its a bigcommerce project.. Most importantly is the graphics on my web site. So need someone who is extremly good at illustrator, CSS, photoshop, web site deisgn..etc I need professional artist. I dont like graphics look unprofessional on my web site. Also SEO, my organic ranking very low. My target is to be on top, when customer search generic term e.g computers, or even specific brand or model. I need the website to look GOOD, (yes very important) so to create the hype for people to buy. Please send me some of artwork / sample of site you done. also how much do you expect from this projector? I will provide you with my web site. I will also show you how I want my web site to look like roughly, will show you some of my competitor's just as a guide. Also important is, I need a capable, flexible, transparent, reliable, honest, ethical freelancer /company.. pls inform me your code of work as you will be dealing with some sensitive information. If youre a company with registered business in local countries, it will be even better. Pls show me your certification. Also you need to create the template in photoshop for me so I can update the product as I expect to update weekly. Also this is not a once off job, there is a very very big chance that I use you again, so its long term relationship, as my site constantly need update for occasions e.g SPECIAL PROMOTION, XMAS need some graphics for XMAS... new year . etc also SEO part is also a long term relationship. Pls let me what you think about budget, too less too much?... etc as this is a new project, and contains smaller project Im new here Thank You. Regards, AA