ok finally something I can comment on.
I also contemplated several heritage breeds, but I don't care for crested (or horned) breeds as I plan to free range a LOT and the crests seem to get in the way. same with feathered feet. (ok so my bantam cochins break that rule LOL) so my answer?
Dorking. for sure.
and they're not as readily available as you might think... mcmurray has silver greys, but IMO the quality isn't there for how I perceive the breed SHOULD be. mine all have foot/toe conformation issues, taper a bit much toward the tail (they should be more blocky), they're a bit smaller than I'd like to see, their eggs are on the small side (my own eggs and those i've had sent to me were all the same), and many if not most hens seem to have too much white on their earlobes - they should be red. but with time and perserverance these can be overcome. I'm sure of it.
that said, I'm doing what I can. I've only got 1 breeding trio right now, with 14 chicks growing out. 6 cockerels, 8 pullets. these birds are all from mcmurray lines, some directly (my trio), others 2nd (12 of my chicks) or 3rd gen 2 chicks from shipped eggs.
Some breeders are working on the other colors, white, red, colored, black, etc as well, but they are not as available as the silver grey. I have an order in with Sandhill Preservation for some red/colored/silver grey, so
i get them soon. Dick Horstman also has silver grey and reds so I may go with his over sandhills. it depends on what I get from my first sandhill order already placed.
IMO the chicks are a bit skittish, but once they grow a bit mellow out pretty well. my oldest pair of chicks (from shipped eggs) free range daily, and hardly spaz when 2 hyper standard poodles blitz on by, and my roo is a big baby. he'll sit in hubby's arms for as long as he can to get scritchies.
I started my research back in April, decided on the breed by June, and researched even more, before looking for breeders... I've only had my trio since October, and my first 2 chicks hatched soon after, but I'm hooked. no other LF for me. tho I will allow the EE's to remain, they were here first. The trio was rehomed because the roo flogged her youngest child - only one he's flogged here is a bantam Sultan roo named Funky, and only then when Funky attempts to flog ME. go figure. for now Funky's only alive still because of the comic relief.
B.Y.C. Dorking Club! thread has LOTS of good info.
Here's my "big guy"