QUOTE(MikeQ @ Jun 25 2013, 04:59 PM)
There are many web design companies but you should go with a good company which fulfill its promises.
For choosing a design and development company, look for someone who is interested in your business not just the development. As a good developer will let you know all the ups and downs about your project because a company is having more experience than you. As they have worked with so many clients so they must be knowing more about the market.
Before contracting with the company , assess their portfolio. Analyse their case studies, keep your eye on their beautiful looking designs because most basic part of your project depends on how the users are interacting with it. Check their client's testimonials. Think about the whole package not just the coding. Make focus on designing part. How a website looks is as important as how it works. Go a step further and look at partners who can add value to the usability aspect of your website , which will define how users interact with your product.
The realization of your vision is all depends on the development firm so you should choose wisely.