Though my main force back when I played 40k was Orks, after a while I kinda wanted an army that had an armor save, so I bought some Dark Angels, because I still wanted something green, apparently. But then I realized I missed melee. So I went with some Space Wolves for a while. Since my history was with Orks, I loved converting models. I wish these parts had been available back when I played, I would've used them if I could.
As you can see, there's a couple different shoulder pad sets available. There's also new torsos you can use as well to help distinguish your guys from your opponent's. Those that want to go all-out can get a bunch of the upgrade pieces as well as a Betrayal at Calth set.