I have the Z7 Mag and I will say it is the best bow I have ever shot! I was shooting a Mathews Ultra 2 so the brace height to me wasn't a big issue. I prefered the ATA of the Mag over the Extreme but that is just personal preference. It is without a doubt the best setup for myself.
I had the first one to hit east Tennessee and bought it. They are good shooting bows...fast and quiet. However they are horribly balanced. They are very top heavy. The ez7 is the same bow with different cams...dream bow to draw and shoot but slower.
I think the best bows they are making are the new MR series. The MR6 is the best handling and shooting bow I've shot in years. Balances extremely well. I had to sell mine to pay for an unexpected doctors bill and haven't had the extra cash to get a replacement.
ALSO HAVE THE Z7 MAG...GREAT BOW...FAST, SMOOTH AND LIGHT WEIGHT. IM 6'5" GUY SO I NEEDED THE EXTRA LENGTH OVER THE EXTREME. LOVE THIS BOW. KILLED FIRST VICTIM SAT. 2.5 YR OLD 5PT.AND MANY MORE TO COME