I hunt hogs with a 7.5" SBH Hunter and don't feel that the extra barrel length is a detractor in any fashion. As a matter of fact I have by gun topped with an UltraDot MatchDot and have found that it is ideal medicine for spot and stalk hogs. I can shoot with both eyes open, am able to accurately train on a moving/running hog for follow up shots and lastly, the dot provides a better aiming point in the last few hours of light. Iron sights, as much as I like them simply disappear on the dark background of a hog close to the end of shooting light.
What I find more important than barrel length is how you carry the gun. With a gun like this a hip holster is just not practical, and I prefer a shoulder or bandolier type holster that puts the gun under my weak side arm. It keeps it from getting hung up when stalking through the thick stuff and allows for quick access if I need to draw.
If you want a new gun, then by all means, go for it. One can never have too many. But if you are looking for something that can securely plant hogs on the ground and is accurate at longer ranges, I think what you have already is pretty good medicine.