I've always bought football games in cycles. One year, I'll buy the new Madden. The next year, I'll buy the new College Football game. I do this because I've learned that major changes come in each game every other year. So I rotate getting the new functions, graphics, features, etc.. without having to buy both games each year. Plus, I really don't have infinite time to go through a season in each game. I bought an Xbox 360 last year with the next-gen version of Madden 2007. It was radically different than the little brother version (Original Xbox). I played several seasons, but have since stopped playing it taking on other titles like Gears of War and Call to Duty.
After reading this Madden 2008 review, I came away thinking I'll get Madden again this year.
A point this review made, was the mad improvements on defense -- especially play calling.
Hummm... yea, I'll probably get it.