If you are going to shoot the foster style or Rifled slugs use a IMP CYL or a CYL choke. If you are using the sabots Benelli like all manufacturers make them and are very cheap in comparison to a rifled barrel. Although with a rifled barrel you may get a little extra control I prefer the rifled choke. The reason I say this is because a rifled barrel can be used for nothing else where as a slug barrel with a rifled choke can be used several ways. With a simple choke change you can hunt birds or use it for home defense. Most manufacturers make there rifled choke tubes only 2 3/4 inches long and thats not a lot of area for a slug to get a good spin. Thats why I recommend a hastings choke tube which is a full 5 inches in length and I have found it to be much more accurate.