What a wonderful group of posts to read this evening!
I can come down on both sides of purebreds and mixes - I appreciate both. I've hatched quite a few of Mayah's mixes, and they have been really pretty chicks. I have one that is a couple of months old and it's a pretty bird, appears to be a male (pea comb with 3 rows of peas) and several 2 weeks old, along with this week's hatch which is Day 21 today, have 14 out out of 22 moved to the hatcher and 3 more pipped. I love the variety and the guessing what might be in there

I have also hatched a couple sets of eggs from a keeper out on the Mesa who has mainly production birds, and the chicks are just plain robust.
I also hatch purebreds, and love them - my Silkies are penned only with one another, one male to four females at present although the males could certainly cover twice that number of hens, and would probably like to very much

My RIR are housed with a few hens that are not RIR but only the one male so there will be pure RIR along with some crosses. I have purebred and mixed eggs in the incubator, shipped and my own.
I feel the same about this as I do about dogs - a purebred gives you a better idea of what you might expect, but a cross can give you the best of more worlds - it rather depends on what you want from your birds or dogs. It also depends on the cross - the chicks from Mayah I know will tolerate our climate and elevation and be a beautiful collection of colors laying a variety of colored eggs. The chicks from the keeper out east of me should be good layers and the males should have a decent carcass by 16-20 weeks. Any males I have past around 8-10 weeks of age will be moved to a grow out area (that I have not built yet - hey, a girl can dream!).
This time of year the hens are starting to get it in gear, and there's a good chance someone closer to you has some hatching eggs for you. Shyscreations is up your way (I think - someone will catch this if I'm mistaken), she has Silkies and Bantam Cochins, and I know there are others I'm just not thinking of who they are right now.