States 1 and 2:
2 inactive states depending on the context.
When the search field is in focus, if it is relevant to the context, you can show a:
- list of recent searches (like Westpac Live's address book search)
- most popular searches (like Westpac public site's global site search)
When the user starts to type, you can auto suggest predefined search terms based off what they have written.
My preferences is 1 with 4