It depends on what you are looking for. Do you want something that will help you get fit via a cardio workout? Do you want something that can be easily applied to self-defense? In reality it is all about the art that is best for YOU, and the ones that readers of your post recommend might all be turn-offs to you.
For guidance, I suggest you check out my book. Soon it will be for sale on this site, but for now it is on Amazon.