hey there John! glad you found your way over here to BYC.
you might get lucky and find breeders who sell day-olds but they will rarely, if ever, be sexed... especially for the kinds of breeds you are looking at. vent sexing is notoriously difficult and pretty much the only people who do it work for hatcheries. of course, you'll find people on this site that can do it, but they never seem to be the people that sell chicks. other ways of sexing day-olds are mostly found in breeds you aren't interested in, like sex-links and other production type birds.
like Katy said, Sandhill Preservation might be a good place to start for quality birds with hatchery convenience. i've not ordered from them, but i hear mostly[/] good things about them. i think i'm going to order some of their ducks (they have an excellent selection).
when i ordered, i went the straight run route. i knew i wanted to put another order in this spring since many of the breeds i wanted weren't available late in the year, but i wanted fall chicks that would be laying while i was brooding my spring batch. i ordered 22 chicks and i ended up with: brahmas (2 cockerels, 3 pullets), orps (2 cockerels, 3 pullets), EEs (1 cockerel, 4 pullets), wyandottes (2 cockerels, 3 pullets), and silkies (1 cockerel, 1 pullet). out of these i'm processing 1 brahma cockerel, 1 orp cockerel, 1 EE cockerel, 2 EE pullets (they are really small birds, not good breeding stock), and 2 wyandotte cockerels (because i don't like the variety so i won't be breeding them). so that's 15 keepers (3 cockerels, 12 pullets) and 7 chicken dinners.
for me, this was a really simple way of ordering that ensured a got some layers and some meaties, but i knew i would be ordering again soon. if you don't think you will order again, straight runs can be more problematic.