Boils down to personal choice as they are all about the same for reliability and performance. I chose Mallory distributor, Mallory Digital 6 box and high output Mallory coil and MSD 8mm wires. They work together great and no ballast resistor required. The Mallory digital box has an adjustable rev limiter standard on it. Then my son runs a MSD box, distributor and coil on his 440 and his car runs flawlessly.