You said that you want to become a better martial artist and there is also a kunfu school nearby. So you can always consider Kungfu to enhance your martial arts skills. If you train you will experience a number of benefits of Kungfu. I found the techniques highly effective for self defense and they are also good workouts as well. Kungfu training is also great to promote your health. However, since you are already into karate, are you thinking of shifting into kungfu totally? Focus on any of of them as it would be rather difficult to learn both the styles simultaneously as both are quite physically demanding. Happy learning!