What is in your area? I am doing BJJ and Muay Thai and its great.
I studied Kenpo for a little over a year. Is the place near you part of the Tracy System? It's awesome, but complicated. It takes the average person about 4 years to earn a black belt (at least the Tracy System)where some styles you hear about people earning black belt in a year. I got to blue belt (still had green and 3 levels of brown before black). It was expensive where I went and that's why I quit. I'll go back one day.
I'm not sure, I'll ask my friend about that. He has been doing it for about 6 years and I think he told me he was a 2nd degree black belt. He said from the first belt to the second is about 3 months or so. I think he said for him to get to a blue belt it took him maybe 3 years? I'm not sure if I remember that correctly. I'm probably wrong, but he started in the 4th grade, and is in 10th now.
If possible, try and fine a Goju-Ryu karate dojo. Your belt progression will be slower, but at least your training won't be useless.