I got a question for opinion. I deciding which opening to choose. What do you people out there think I should choose Nadjorf Kan or Richter Rautzer 

Well unless i am mistaken the Richter Rauzer is a choice White makes--perhaps you mean the classical Sicilian? Each is completely different in terms of its personality--Najdorf is quite sharp and requires lots of memorization. Classical Siclian allows White several choices such as the Sozin attack of other such lines. The Kan is more solid and perhaps not as well known as White so perhaps that is the best choice

I like the Classical and the Taimanov so far.  A lot of people have been using the Kalashnikov Sicilian on me lately.  

Try them all and see which one you like best, they're all very different. Out of those three (Najdorf, Kan, Classical) I would probably go with the Kan, but I'm partial to the Taimanov and they have some similarities.

agree with Eric's comment - try them, and see which one you like...