Yeah, leghorns are the obvious answer, but if you go through Henderson's Breed Chart you can see other options and then go to Feathersite to see photos. The problem is that you can get leghorns about anywhere, there are that many of them. That's why they are the obvious answer. The others may be hard to find.
Henderson’s Breed Chart
http://www.sagehenfarmlodi.com/chooks/chooks.html
Feathersite
http://www.feathersite.com/Poultry/BRKPoultryPage.html#Chickens
Henderson’s Breed Chart
http://www.sagehenfarmlodi.com/chooks/chooks.html
Feathersite
http://www.feathersite.com/Poultry/BRKPoultryPage.html#Chickens