Santa Clara County includes 15 Cities, covers 1,316 square miles, and has a population of about 1,750,000.
In order to give an intelligent answer to your question I would need to know something about your requirements i.e. detached house, Town House/Condo, price range, number of bed and bathrooms, older or newer, commute tolerance, etc. Please help us to make our advice useful to you.
You would also find the McCormack's Guide for Santa Clara County a very good source of information on all the Cities in the County. http://www.mccormacks.com/content/view/406/92