I agree that large or small company does not matter, as long as you ask the right questions of the RealtorÂ®. Are they internet savvy? Will they be able to provide marketing for your home on a good enough level on the Internet, since around 80% of buyers are looking on line now.
I agree with others, that where an agent is located is not as important as how knowledgeable they are about the neighborhood. Their ability to price well, know the nuances, are all important points.
Having said that, how far away is far? In reality, a good agent who takes a listing a distance from them will hop on the highway and show it whenever needed. A lazier agent may think of reasons to put it off. So this gets back to my 'your interviewing the agent' portion of my answer. Make sure you are comfortable that they know sales past, future trends, hot spots for sales prices, good or bad, in the neighborhood, etc.
As opposed to 'large or small' agencies, what agencies seem to do the most sales in youro neighborhood? By that I mean, whose signs do you see the most? A good place to start your search would be with one of these brokerages.
And much success with your home sale!