Foxy... I too am set on the Orps. I am having a really hard time waiting. But... I'm not set up yet. I have my heart set on blue, buffs, splash, and black. I originally planned on buying straight run chicks but after further research now I've decided to just buy eggs from several different breeders and then order a few cockerels so that my roo won't be producing offspring with any sisters. Or maybe I'll just be sure to keep only roos from one of my egg batches. Stay in touch and let me know how it works out for you. I'm sure you'll be getting yours before I will mine. I'm gathering materials now from craigslist and freecycle getting prepared to construct my "hatchery". It'll be mid to late summer before I can start ordering eggs. Good luck to you in your adventure.
Oh also, just a thought on roos... I wouldn't be too overly concerned about an aggressive roo, I would think he would be more prone to protecting your flock (and your investment) than a roo that was docile.