With Magento, you must have someone who is a Magento developer unless you want to invest LOTS of time learning how to use it. Especially if you want a custom site. I like the way that it handles products a little better than the way Shopify does. That is one reason that we almost went to MagentoGo. But you get zero support unless you are willing to spend $25k a year to be Enterprise level with MagentoGo. With Shopify, you can set up a store with minimal PC experience and concentrate on what is important, selling and taking care of your customers. The level of support with Shopify is outstanding. That is what really what won us over from the first email to Shopify.