Stormboyz are good, wierd boyz (upgraded to brainboyz) are good. Both will be in tournament lists imo.
The power of the list is pretty much the shear number of shots you can pack in. Most armies will have a hard time dealing with all of the targets.
Orks won't start taking any tournaments, but they definitely got better. Perhaps the first turn hidden power claw charge with stormboyz will be the "big" list. Time will tell.
Dark Angels 1750 win/loss Record
Win - 23 (Belial helped wreck Ryan's puny Eldar)
Loss - 13 (Brice's Necrons wiped me)
Draw - 2 (The 13th hold out in alpha take and hold)