If your main goal is egg production, White Leghorns were definitely the way to go for white eggs, but for brown eggs, you need to get some Black or Red Sex Links. The White Leghorns and the Sex Links are the layers used by commercial laying houses, with good reason--they are egg laying machines, consistently churning out over 300 eggs per year. Sex Links are hybrids produced by crossing red gene roosters with either barred gene hens (which gives you Black Sex Links) or with silver gene hens (which gives you Red Sex Links), and they are considerably better layers than either parent breed (one of the interesting quirks of hybridization). They are sold by hatcheries under a lot of different labels (Black Stars & Bovans Nera for BSLs; Red Stars, Brown Sex Link, Gold Sex Link, Cinnamon Queen, Bovans Brown, Golden Buff, Golden Comet, Hubbard Golden Comet, Isa Brown, Babcock Brown, Warrens, Hylines, Gold Lines, Lohmans, Lohmans Brown, etc. for RSL), which can be confusing, but there are really only two varieties, Black and Red. I've had both varieties, and personally I prefer the Blacks as mine have been friendlier than my Reds, and have laid slightly better in really cold winter weather like you have in Kansas (I lived for a while in northern Kansas). But no matter which Sex Link variety you have, they are all egg laying machines.