What is the best kava to buy?

I'm curious, what criteria would you use to determine the best KAVA to buy? Is it purely based on taste, or do you also consider factors like potency, the method of preparation, and perhaps even the origin of the kava plant? Additionally, are there any specific brands or types of kava that you would recommend for those who are new to this traditional beverage? I'm eager to learn more about your thoughts on this matter.