Callaway created the Big Bertha B21, a new driver to reduce spin, promote longer distance, which should help to fix your slice.
Callaway's Big Bertha line is designed for forgiveness and length. This new driver is exactly what that does. The nerdy details are as follows. It is the first high-launch head with an ultra-low forward center of gravity to produce less spin for a more consistent ball flight. This new driver still implements callaways famous jailbreak technology that everyone has become accustomed to.
To learn more or to buy: visit Callawaygolf.com