looks pretty sweet. I'd add some rokkit launchas (like 3 to a mob or something?) to take care of the pesky armor or some big stuff from a distance
Orks are my second army that I kinda do just because the models and fluff is great bu t I'm gonna wait untill the new codex comes out to invest much more into em because sadly I rarely win with them... except Orks dont lose dey just get to try again later!