Ideal has Exchequer, Red, Buff, Light Brown, Dark Brown and Brown Leghorns. I have Exchequers, Reds and Rosecomb Browns from them and I must say their exchequers are quite nice, lots of white and not so much mottled like other bloodlines. The Reds are nice too, didn't expect such nice even deep colour from a hatchery but they do look quite nice(am just waiting for them to grow up some more).
Later this month I will get a Pure Black Leghorn cockerel from SQ bloodlines, I will cross him over some of my ExchequerXBrowns and see what happens(some have red bleed through in the hackles but most of them are solid black) and exchequers.
I will also get a few california greys next year and cross them with Exchequers and see what that does to the exchequer pattern. I love experimenting with the different colours.
I doubt I ever get exchquers that are anything like the european exchequers, but at least I may be able to make them at least look like it.
Next year I also start my Blue laced red leghorn project.