PAX East 2012 registration has opened as of today, November 3, so you may want to grab up a pass before they sell out. The expo will be happening April 6th-8th in Boston with one day passes going for $35 and three day passes costing $65. They have even made deals with local hotels so you can book your room (or rooms if you're going as a group) at a discounted rate.
It's PAX, hard to say anything else. There will be fun and awesome in ample supply. The best part is that tickets and hotels really aren't that expensive. Granted the entire trip will take a hefty chunk out of your bank account, especially if you fly, but this is PAX, so its worth it.