You have every reason to be confident about the outcome of your new site if you take your time and find the right web designer. We know you want the job done right, so you simply have to realize several important points about the process for discovering the web designer who is best suited for you.
Go ahead and ask yourself - what's the exact purpose of your site? Are you looking out to create a strong brand recognition or make more sales? So obviously a designer cannot proceed very efficiently if they do not understand what you want from them. What kind of look and feel do you want the final design to have? This is just the basics of putting together a site that is appropriate and targeted to your particular niche audience. The feel of your site should strongly reflect your brand's message/tone. If you do not know who your target audience is at this point, then you need to stop and back-up a little bit and find out. If you already have an established brand then look for elements that your target market wants/desires. Actually, all of this will make the designer's job must easier, and that will mean your site will look better and get completed faster.
We always recommend that the entire project is handled by one person web site design or business. Yes, there are different aspects of the entire scope, but that is all right since all good designers are familiar with the process. So you just really need to be careful if you are thinking about having different companies work on the same design project.
On the other hand, if you simply must avoid the one person designer, then you need to hire a company at a higher cost, no doubt. However, if you require programming, then your designer will more than likely be able to make recommendations for you or just get it done.
It is very common for some design businesses to want to sell you additional services related to marketing your site.
Some people may be interested in that while others may not be, and we have no clue if you would be or not. There is a valid argument with only going with those who specialize rather than trying to sell all the services, etc. The bottom line here is your promotional activities need to be in very sound and capable hands as does your web design.
Even though it takes effort, it is very much worth the hassle to be patient so you end-up with the best web designer for your project.