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

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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Orange Layout:

More responsive themes: Premium Responsive WordPress Themes

Unique and flexible responsive business theme
Price:
Single Theme Package: $45
InkThemes Membership (All Themes): $125

Regal is a theme that is flexible enough to fit into many types of niches, including: business, portfolio, personal, hotel, or wedding website. Theme features include 8 color scheme options, a gallery template, theme options panel and more.
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More portfolio themes: Business Premium WordPress Themes

Sharp, unique and eye-catching responsive theme
Price: $35
Apollo is a theme that stands out.  This theme comes loaded with not only a beautiful layout and theme skin, but also great features, including: extensive post formats to allow you to add videos (YouTube, Vimeo and Self Hosted), images, galleries, quotes, links and more to your posts.  It comes with a filterable portfolio, 3 custom widgets, social options to be used in the header, short-codes, and a choose your own theme “color-picker”.
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More business themes: Best Business WordPress Themes

Stylish and fresh business theme
Price:
Monthly Subscription: $14/month (access to all themes)
Yearly Subscription: $97/month (all current and new themes)
Eternity Subscription: $297

Break out is a theme for any business, portfolio or photography website that wants lots of features including: 4 featured slider options, 60 useful shortcodes, 4 color styles, custom portfolio templates, and an extensive theme admin panel to further customize the look of your theme.
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More portfolio themes: Business WordPress Themes