I was in your same boat a month ago. I had gone through a million opinions. I went with Rocket pipes. If you plan on owning a banshee for long, you will know what rebuilds are all about. And during that rebuild is when the porting comes into play. That is where the rockets will shine.
Right now i have a bone stock motor with rocket pipes, + 7 tiiming, 19 cc dome NOSS head, rad valves, and trinity intake. I would not have done it any other way. Power band comes on strong and smooth and doesnt stop pulling. Alot of people who have ridden my banshee swore it was ported to some extent.
Jeff