Torque Converter

Which converter should i go with that will offer the longest lifetime and handle up to 5oohp/800 ft lb of torque?? I dont sled pull but i do tow and my right foot is not shy of the skinny pedal. Also ive heard a lot about stall speed. what is the stock stall speed?? does anyone know?? And what stall speed should i look for to get the best performance?