How far offrom the tree do you want to fall off?
Are you looking to go way deeper into the way you already took? Then I would suggest you to try a different Karate style that feeds or is feeded by Shukokai. Goju-Ryu for example, or a different approach like Shotokan.
If you are looking to be a more complete martial artists, I guess the sensitive way would be to go either towards aikido or jiu-jitsu for throws and floor fighting techniques, towards Kyokushin karate for hardening and full contact training, or towards some styles of wushu (kung fu) like Wing Chun for speed and short-range swift attacks.
Last but not least, another suggestion might be to take an advanced technique or group of techniques of your style, or from a relative style of your own, and specialize yourself in such techniques towards perfection.
Just remember, sometimes the fruit must fall off the tree before it can serve its own purpose.