Ditto on thelyonsking post.
When all else fails, I will fall back on the thumber to save some strokes as long as I have some room to work with.
What I have used,
Z Flick ~ max distance with a slower/later flip
ESP Venom ~ another max distance thrower that barrel rolls sooner and sticks better on landings
Champ Valkyrie (older runs) ~ Great distance and average speed flip, turns into a roller on landing for extra distance, also excels in FH and BH departments
Champ Firebird (older runs) ~ Good distance and most comfortable to throw.
I've recently lost three of the above though to water/swamps and trees and am using the firebird exclusively for now.
There are many more that work well (wildcat, xs, predator, etc...) too, it all depends on what you need them to do. My 2 cents, use something in a Z/champ plastic. Thumbers and Tomahawk beat the crap outta discs. Also, if possible, find one that you can BH and FH with too.