Need some energy!

I have two questions, really.  I'm thinking about stopping drinking coffee in the mornings to kickstart my day.  I'd like to substitute my morning coffee habit with juice.  My first question is this: what juice combination(s) will be a good substitute to help me both through the whole caffeine/coffee withdrawal (headaches, irritability, etc.) and help me boost my energy similarily to the way that caffeine did?

My second question is this:  what brand or model of juicer do you recommend?

Thanks in advance for your time.

--river