I was going to suggest autosexing or sexlinked.
Those are great breeds! I'd also suggest Welsummers. Mine is very cold hardy. Of my flock, she does the best in cold. They lay dark brown eggs.
I have had 100% luck with hatchery sexing (oops - I probably just jinxed myself). The one roo I have was a straight run bantam from a feed store.
I now only get my birds from my local tsc. The gal who does the chick ordering knows what she's doing and orders all different breeds and all pullets from Hoover's. She makes sure they are separated appropriately. The only time that fails is when there are only a few of each breed left. They all get put in a "bargain bin" to make way for new orders. So, yes, I got a naked neck, a lavender Orpington, and a Spitzhauben from a bargain bin labeled "Blue Andalusians," but all are lovely ladies.