I really like what you've done with these orks. The conversions (err, ahh... konversions) add a lot of details to the models and the paint jobs are nice and crisp, enhancing the detail that you've added.
One of my favorite touches on yer boyz is da burna, i enjoy how you can still see the imperial eagles from the flamers he cannibalized.
That Rhino is beautiful as well. I'm a little fuzzy on the ork rules though, is that just gonna be a looted Rhino and be a transport for da boyz?