I first started with a hybrid called ' Amber star' and they were fabulous layers, an average of 343 eggs in their first year but i got distressed with the manic way they had to eat to produce eggs at that rate and they problems with their joints etc and that they are all layed out within 18 months. The eggs were huge, watery and had very thin shells even with extra grit etc.
I decided to go for a classic breed that was dual purpose, the barny has the bonus of having a very spread out laying season and being good in the cold. The eggs are fantastic with really solid shells and they birds are happy and relaxed and produce well for years. Since then i have become a bit of a nut about keeping livestock in a non intensive and free range manner.