BYC is having issues. I had wanted to post comments with each bird but the photos are not coming up with quotes.
First, there is a keel issue that I learned about from Deann.
This is where the keel is not nice and straight, it can curve both sideways and up/down. One should turn the chickens over and feel for this fault. I think it would be best to have an expert to show you what to look for. I can't quite figure it out on my own. I don't know if bumps are bad or normal. I do know a sideways curve is bad and would cull (from the breeding flock) any bird that had this problem.
Second, the comb is an issue more in the states than in the UK. The UK standards recognizes that the crest will cause a wonky comb whereas the US likes a more upright comb. It's a significant difference and almost not fair to the US CLB keepers to have to breed out a trait that the UK allows in their exhibition birds. Here is a link to the latest SOP draft for US CLB.
https://sites.google.com/site/thecr...p-revision-1-replaced-late-2013-by-revision-2
Third, color - I wouldn't choose Butterscotch because he is too colorful already.
Finally - if you are using the birds for your own cross, don't worry about SOP. Base your choice solely on personality. Always breed friendliness into your birds. If you are selling them for back yard egg layers, the friendly factor is far more important than the comb type.