Can't speak for the price difference. Personally I think the other guys are extremely over priced. I have the 4.5" Cobra NH's on my bike and I love em. If you have lowered your bike you might have some clearance issues. I had mine dropped via lowering blocks 2 inches, had to raise it back up an inch to keep from scraping the bottom of the pipes on turns. Other than that, no problems. They are louder than most other slip-ons. The removable baffles can be wrapped, left unwrapped or even completely removed if you're into the "open" exhaust sound. They look really good and I've gotten nothing but compliments on the sound and looks. Compared to expensive slip-ons from other manufacturers, I'll take the Cobras any day.
Aloha....Mike