When choosing a company to design any element of your company/stationary/logo etc you should think carefully about what type of agency to use. There are unlimited choices these days with various design agencies as well as freelance ‘amateurs’ working as designers in their spare time. Naturally you would not want the reputation and branding of your company left in the hands of someone who is not qualified to produce the high standard of work you would expect. Therefore we would suggest using a reputable graphic design agency with proven track record.
These days most companies will have a website which will display not only reviews of the work they have undertaken for clients but will display a strong portfolio of work to back this up.
Choose a graphic design company that will work along side you in order to achieve the desired goal and ensure the final outcome is exactly as you expected it to be, and also the price you expected. Always agree on a price before any work is carried out in order to avoid any expensive bills.