FOR LAYING PURPOSE?? Most definate my vote goes with the Golden Comet (a.k.a. red star, buff comet, etc.)
The girls I had were over a year and out of seven hens I had AT LEAST 6 eggs per day.
Even in winter I got a minnimum of 5 eggs per day.
I have R.I.Reds, Buff Orphs., Barred rocks, Black Australorps, Amerucanas, White Rocks, and new babies said to be Auracanas.
The Comets are docile and very nice.... most of all AWESOME EGG LAYERS!