SWISH and Ecommerce site design

I have an ecommerce site that has been installed and now I need to add the design. I am purchasing an existing SWISH template that will need to be modified. so: 1. You MUST know swish 2. MUST have portfolio of high end ecommerce sites designed 3. This shopping cart is in XCART, so if you have xcart design experience, that would be preferable. Must be able to start immediately and deliver high end design.