*** High-class ecommerce website design for oriental rugs ****

I am a computer consultant for a major rug company in NY, and I am interested in having an e-commerce website designed for this company. It needs to be a very high-class, professional website (they sell high-end antique rugs and modern fancy rugs; it should be like a website for jewelry, paintings, or antiques). The most important aspect is to design an impressive, clean and crisp site that will load in a reasonable time. It also is preferred if SEO concerns are taken into account when designing it (but this is not a must, as I can hire somebody else for it). I am considering using yahoo store account, monstercommerce, or volusions, but if you have another shopping cart option in mind then I will consider it. I must see previous e-commerce design work (your portfolio).