Everyone still thinks the iPhone 5 is coming this summer. Wake up, this isn't going to happen. Apples marketing isn't stupid. Use a little logic when thinking, instead of what you want.
How does it make sense to release a completely new iPhone when it just appered on a new carrier. The largest carrier in the states.
The most I can see happening is a minor bump in hardware, and the focus is going to be on the software side. I see iOS 5 before I see the iPhone 5 this summer.
The current iPhone has more than enough power to compete with all the new dual this and that android phones that get 5hrs of battery life. Apple is about user experience.
This time around it's time for a major iOS update. The phone part is fine till next year. Everyone will get the update so there won't be any hard feelings that your phone just got replaced in 6 months. (of course verizon users ought to be use to that by now)
Who really uses that much data??? if you do, pay the bill. If you want unlimited(which most people due,not because they use that much data they just feel they arent held back by the carrier

) get your iPhone now and enjoy. Wait for the big update this summer and get the iPhone 5 in '12.
When LTE comes out we're all SOL anyway on our current plans.