What martial art style should i take

I have been practicing the martial arts pretty much my whole life and i have done basic katate to shotokon and i have practiced kickboxing and wing chung and i am currantly practiceing combat and goshin jujitsu and i really love it but i want to learn a much more in depth "the art of the samurai warrior" and i want to get in a more orthadox style and a more pure one. Dont get me wrong like i said i LOVE goshin and combat jujitsu but i want to go more spiritual and more authentic but have the same affect. so my qeustion would be where should a take my next step ???