If you’re into the style of themes that WPZoom offers, then there should be little to hold you back other than price. Their themes are clean and well-organized, giving you opportunities to fit lots of content into a tight space.
WPZoom shines with magazine style themes. They also have a nice recipe style theme and a nice restaurant style theme. That said, they are a little expensive, especially for developers, who can expect to pay about $200 up front and then over $200 a year for on-going support.