i have had a couple champs but lost em both to the woods. then i went with an ecostar and it was less stable at first (2-3 weeks of consistent play) and then started flying much straighter with less wavering (except for any kind of wind :( only drawback).
definitely prefer the ecostar because of the feel. looks great and the groove on the rim is a little more pronounced, which i like. it has turned out to be more of a specialty disc for me since most of the courses in madison are short and tight, so i like to use it for forehand rollers to the left (good for headwinds), long flat anhyzer forehands, and S with a straight finish forehand drive. on the long S drives the ecostar skips so straight its ridiculous!
i liked the champ, but the ecostar is where its at!