I also throw max weight Champ Teebirds and Leopards almost exclusively. The Champ Leo is an absolutely awesome disc; I'll regularly get one out to 350' with relatively little power and some hyser on the release. They are very reliable, as long as you know how to throw them, because they are in no means a driver that you can release flat with max power and expect it to fly well. The Leo taught me how to decrease my power on drives for better controllability and accuracy since it is more about finesse than crush.
The Teebird is my favorite disc in my bag by far. I carry 3 max weight TBs at all times (11x Glow Champ, 12x Champ, and Echo Star) that all have slightly different roles due to their inherent differences in stability and glide. My E* glide the best and produces the most distance (~400-415' on a flat drive with no elevation) and is also the least stable, the 11x Glow Champ is my stable TB, for when there is a little more wind or I need a straight drive sans S curve, and the 12x Champ is between the two, and I'll use it on monster anny drives out to 450-475' that I want to stable out at the end and not turn into a roller. They only thing I can't get the TB to do is act as a super overstable driver (because it isn't); that's why I carry a Banshee.
Cheetahs are great discs too. Like stated previously, they will be less stable initially than a Champ Leo and subsequently more workable. One of the guys that I play with all the time uses a Cheetah constantly, and he can do more with that disc than any other one in his bag. The only problem is that they only are produced in DX, of which I'm not a huge fan due to low durability (Champ is my favorite).