Blackberry doubt... Storm, Bold or Curve- Javelin?

I am going to buy a Blackberry, but I want a phone with Wi Fi on it. I like the Storm, but I have been told that they do not have Wi FI connectivity. Is that true? If so, I also like the Bold, CUrve or Javelin. Which should I buy? By the way, which of these models are the latest versions of blackberry? Thanks