I know there are a couple of nice communities that have been developed in Georgetown. Here is a web site that may help you begin to understand your options in the Austin area:
And here are links to a couple of the communities in Georgetown:
Sun City: http://delwebb.com/communities/tx/georgetown/sun-city-texas/
Heritage Oaks: http://www.heritageoakstexas.com/index.html
Good Luck and Happy House Hunting!!