Actually Steve, you DO need a choke tube that can shoot Hevi-Shot. Not every choke tube allows it. If you notice, some will be LEAD ONLY. Make sure when you buy a choke tube, it says it can handle Hevi-Shot.
As far as "hype"...the hype is real. I questioned whether or not I should spend the extra money, and finally when I bought some Nitro shells with Hevi-Shot, i am glad I did. You will be glad you did.