Right now I'm sort of debating on a long distance turnover driver... The only thing that I really have for that is my really beat up DX Destroyer. So many discs to choose from...I would like something to be a tad slower and more durable without sacrificing glide.
Before recommending a long-distance turnover driver, there is one decision you must make:
"When I throw my long-distance turnover disc, do I want the disc to try and straighten out near the end of its flight, or do I want the disc to keep turning over all the way until it hits the ground?"
If you want a long-distance turnover disc so you can hold a slight anhyzer and not get a funny bounce/roll when it hits the ground, I would recommend a Discraft Z Avenger SS. In my experience, this disc holds a great anhyzer line, yet has just enough low speed stability to straighten out near the end of its flight to have a soft landing without much bounce/roll. It's also a great hyzer-flip distance disc. Other discs in this category are the Sidewinder, Monarch and the Vision.
If you want a long-distance turnover disc so you can throw big, high, curvy anhyzers, and have a great roller disc, I would recommend a Champion Roadrunner. I've seen some amazing shots with this disc. You can throw some big, curvy anhyzers with the Roadrunner that will continue to curve until they hit the ground. The Roadrunner has so much glide it looks like a kite in the air. Sometimes, though, if they hit the ground at too steep an angle, you will get a big bounce/roll when it finishes. They are good for hyzer-flips, but you can't overpower it, otherwise it will continue to turn over after it flips flat. They are excellent for roller shots. When I throw mine for a roller, I simply throw it flat and hard and the disc does the rest for me. The only other disc I know of that behaves like the Roadrunner is the Discwing Quarter K2.
However, you can have both types of long-distance turnover discs in the same mold. Buy an Innova DX Valkyrie. After an initial break-in period, it will fly similar to an Avenger SS. After a much longer break-in period, it will fly like a Roadrunner. All for $8. Even though the disc is not in a premium plastic, it will have a long, useful life. Also, for rollers, I really like DX plastic. It's my suspicion that premium plastic is prone to funny skips and bounces as it rolls on the ground.