Keep your eyes on the prize... the Prophecy is by far the kite to get your hands on. I wouldn't spend more than $200 on either the Illusion or I2K. They are both novelties to fly, but in my hands, they just don't hold my interest very long. I do like the original Illusion better than the I2K, but the I2K is fun in higher winds with the Spoilerz installed. In fact, that is the only way I fly the I2K. The Illusion vent is also a sweet ride, but good luck finding one of those, I think you'll find it easier to find a Prophecy. The Proph will also be more useful in a low wind area like Atlanta. Because of it's size, it can fly in 2-3mph wind pretty easily.
I wish you luck in your quest !