I am working on a project for an electronic mall (like ebay or etsy), and am inclined to go with Magento, primarily for its EAV database layout, which I would expect to make it scalable for large amounts of regularly changing inventory. But would also be very slow and I don't see Magento being used in this situation. Although I could throw additional hardware at this to speed this up, there is probably a limit to that. Any other options that would be better for this situation?