Some of the other posts did reference some of the hipper neighborhoods that are great. But here are some others: 78704 was mentioned (Travis Heights, Bouldin Creek), also check out the Barton Hills neighborhood, it rises above Zilker Park, you might find something, maybe, in Clarksville. Look in Hyde Park, there are large homes in the $850k range but also a ton of homes in the $300k range. Also try French Place and the neighborhood that runs along Shoal Creek from 38th north to Anderson Lane. And the neighborhood that runs south of 38th, between Lamar and Mopac. Your realtor should be able to decipher that for you. All of these neighborhoods have large trees, some have large lots, and all have plenty of places to walk to. Enjoy.