The surround will be what gives your fireplace its look and feel and will also determine the mood it puts you in. Normally, people tend to stick with the brick fireplace surround because of the dark, cozy feeling it has. Also, the fact that bricks can not catch on fire (themselves) means you don't have to worry about your house catching on fire if you forget to put out the fire before bed.
Many people like to be "do it yourselfers" and they try to set up their fireplace surround alone. One thing you must realize is that not everybody is a professional brick mason. And if you are not one, then you probably shouldn't try -- this is a job for the pros.
There are techniques and guidelines that you are most likely unaware of. You don't want to do a haphazard job on something that will hopefully last for many many years and bring you safety and security.
When choosing a fireplace surround, take all these facts into account. Don't just settle for the first thing you find or the cheapest deal...make sure you use due diligence in selecting the best possible surround design for you and your home. You can have a brick one, a stone one or one that is also a bookshelf which is perfect for a home library.
It all depends on your personal preference and budget. The internet has so many websites and places that you can browse through thousands of fireplace surrounds and find out more useful information with a click of your mouse!