Dave, its your money to spend however you choose, but heres my opinion. if you drill and tap the gun, it becomes very limited in use, unless you remove the scope and then have to re-sight when you put it back on. the cantilever barrel will keep your scope dead on when the barrel is removed so re-sighting isnt needed. ive had mine for over 10 years now and changed barrels millions of times. its NEVER had to be re-sighted after switching back to the scope barrel. if your only looking for a dedicated slug gun, its not as much of an issue. if you want to have a versital gun, get the cantilever barrel.