A Logo can be a symbol, a typeface, or both. Whichever you go for it amounts to the same thing. Your logo is normally the first contact a potential client has with your business, and first impressions count.
A good logo design should represent your company in its best possible light, reflecting its core values and principles. At the very least a well-designed logo will breed the confidence you and your customers have in your organisation. Your logo is your beacon so make it shine.