I saw SAW V but did not find it as gory and horrifying as the others..I would say that SAW sequels have started to loose its old touch...Jigsaw is already dead..and the story is the same...If you want to watch real good Horror/Gory movies then try these:
Hostel I,
Audition,
Oldboy,
Shutter,(not the hollywood version...the korean one is better!!!)