eagle, banshee, leopard. i carry a teebird too, but that and the eagle are my main drivers.
Booyakasha. Eagle and Leo with the Banshee thrown sparingly for OH and spike hyzers cuz it's a meathook.-Banshee
-Eagle X
-Leopard
The XXX and River are 7 speed drivers, just like the Teebird.
The Predator is a 9 speed driver. I agree that it's not a fairway driver.
I would call 6 and 7 speed drivers: fairway drivers.
The speed thing came from the wing size of the drivers, for example the Teebird has a 1.7 cm rim thickness making it a speed 7 driver. The River (and Banshee) is a 1.8 cm (speed 8) and the xXx is actually a 2.0 cm making it a speed 10. Keep in mind these numbers come from the PDGA Approved Discs pdf and may be subject to error but AFAIK this is the least subjective way to assign a "speed" to a disc.
Personally, I consider speed 9 the distance driver threshold but that's really relative too.