I am no TeeBird expert, but I have a totem TB that is pretty domey and is very overstable for me.
I found an older DX at PIAS (stamp has bird with spread wings) that was flat and had a great feeling plastic. That disc is great! Very straight and long. I'd love to find more that fly like that.
Nothing else in my bag compares: GL River, Amp, Trak, S-FD. All of those have a bit of OS to them, but this simple $5 DX TeeBird blows them all away.