Clean and modern design with an integrated Page Builder
Price: $35
Good Space comes with an awesome tool to allows you to build pages within WordPress easily.  You may create unlimited sidebars, pick from over 450 fonts, have the choice to pick your own cufon by using a cufon uploader, a theme options panel, 6 Footer Layouts, 4 Blog styles, 15 predefined backgrounds, pricing table, and a drag-and-drop page builder with slider manager.
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More portfolio themes: Best Business WordPress Themes

Clean and modern portfolio for businesses
Price: $30
Spotlight is a unique theme to showcase your portfolio in a neat way.  Theme features include: 11 Color schemes, a social networks custom panel, and contact form.
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A responsive photography theme
Price: $35
Crius is a premium theme that features: 3 Homepage Styles, 6 Gallery Templates, 7 Custom Widgets, 200+ Google Web Fonts, a built-in short-code generator plugin, Kenburns Slideshow and more.
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A crafty theme for child care centers or other kid-oriented businesses
Price: $35
Kids Voice School features include: 10 color variations, 11 custom widgets, 7 sidebars, gallery custom post type, AJAX contact form, and more.
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A powerful responsive theme with custom choices
Price: $35
Natural is a theme that comes with a powerful admin panel to create a corporate website, a portfolio or professional blog in minutes. You will have unlimited home page layouts, custom headers (display an image, full-width slider, or a map), choose from 16 pre-defined color variations, a big collection of 130 pre-made background textures and an uploader to use your own custom background, a built-in like button for post AND portfolio items, unlimited sidebars, 5 sidebars (footer, sidebar, portfolio, gallery and page setups), 3 responsive sliders (choose from FlexSlider, Elastic Image Slideshow, and Responsive Slides).
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White Layout:

Orange Layout:

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