What is the best phone and plan to use with Google Voice?

A lot of questions about Google Voice:

How do you integrate Google Voice into your mobile life? I’m thinking of getting a simple pay-as-you-go plan to take advantage of the free texting that comes with GV. What’s a good method to keep my minutes down? Some have suggested using favorites lists to avoid paying anything. How can I make my Google Voice number display as the caller ID when I make outgoing calls?