I have the Lat 64 Diamond and it's one of my farthest discs - however, it does sometimes go right hard without stabling up (likely due to my form as much as the under stability of the disc). I chose the sapphire to get more speed and stability without the wider rims of other similar discs. After a few throws, I haven't added any extra distance from the speed change thus far, but the opto version consistently finishes to the left - which is one of my two goals. Skyline shipping was definitely faster than some of the other online stores I've used.