About any of the newer style smaller calls will run faster than most of us normal people can go anyway. Just find the model that feels best in your hands and you can run comfortably. Tons of them out there. I can speak to the quality and speed of the Grounds Real Thang and G Overhauler, Field Proven Matrix, and Molt Gear EX3D. Now, you can spend alot of money on any of them and I own some of them yes, but honestly you won't get any higher pitched or faster than a Grounds Half Breed, for a lot less money. They are ugly to look at and don't sound all that good to human ears, but the half breed could arguably be the killin'ist call of all time.