I suppose we must be disagreeing on what a good cuckoo is. I hate the male I posted above's straightness and evenness of barring in the saddle area. I do agree I think his tail barring is rather nice though would like to see better alteration of bars and more v shape but I like that he has some clarity and distinction of bars. I do not believe the two go hand in hand (straighter even bars in the saddle area and good clean barring) as we see many Dominique males across the country with exceptional barring and are free from both faults.Nice looking bird and he is still "Cuckoo" just a better Cuckoo patter than most.
When I click on the picture and enlarge it I can still see the fuzzy "V" barring common to the Cuckoo pattern in a Dominique and faster feathering Barred Breeds.
He may have other genes in play giving the short tail and closer barring pattern in the Hackles and Saddle feathers but that gene doesn't seam to affect the barring in the wing Bay and Bar area.
Chris
Also the male leghorn you posted above is also far too even in the bars - for one his females would be very dark, for two the male's light bar should be almost twice as wide as his dark bars. Even though he has the v shape he is still not correctly marked. To have these even bars is something I would never intentionally select for.
Now as far as having good clean distinction of bars, yes I think clarity of color is very important in the cuckoo birds but I would much rather have a bird that was too smutty than one with these even straight bars as the smutty ones are much easier to clean up with better breeding the straightness is a plague.
The male above that you liked is bye bye too many DQ chicks and someone made me an offer on him in a job he will not be siring any more chicks... sorry for Melody's sake I won't say where he went

Such a beautiful breed and a difficult one to get right but they sure are nice when they're good! We need some bantam Dom breeders to teach us all how it's done I guess!