Grey Hunter Squad Composition

Recently I have been taking a hard look at the Space Wolf army I am rebuilding, what I am seeing in the local gaming scene and what I see with what other people post online. So I gotta ask a question here, what are we doing? The armies I see on the Internet and in the tournaments are all running 5 and 6 man Grey Hunter spam in razor backs. Some guys are running twin linked assault cannons, hoping for that magical '6' so they get rending, and others are running a lascannon twin linked plasma combo for some odd reason. Either way - I don't get it!