It have to be remembered that the site, logo, business card, the appearance of a representative of the organization - these are the factors that always affect the opinion of potential customers of your services.
At the site visitor's impression of the company is formed on the basis of a number of (user friendly navigation, clarity of information, "interesting" supply) factors, the impression of the design and its ease of playing this important role.
Having poor quality design, you risk instead of a marketing tool to get the anti-advertising (repellent, defamatory).
The choice is yours. Either you choose a bright picture with screaming unclear how sticked graphics or designed on a modular grid interface, taking into account the psychology and perception of your site visitor.