I have ordered from McMurray a couple of times and will be doing so again in about a month.  They are great to work with.  I have gotten different bonus chicks. once was a speckled hamburg, one was a cochin, one time I got an extra faverolle rooster and that's what I ordered.  I ordered 25 and got 27.  The fav. roosters are so pretty and a nice stew rooster also.  50/50 isn't always what you get with straight run, one time I got straight run marans and I got 1 hen and 4 roosters..I sometimes order straight run so the hatcheries will not have an excess of roosters and destroy them in an inhumane way....although I am sure the rooster thinks I am being inhumane when I sharpen the axe.. so in other words...go for it, order from McMurray.