A lab chessy cross would be very cool and most likely a very good dog .
As a lab guy I like the half and halfs -though you tend to get some different personality.
The dog in the picture was half cattle dog and half lab --very durable, very smart tho not as loving as my labs have been. not great in the water but good in hot weather.
Enjoy the puppy hunt as most likely you will be hooked pretty quick. the Chess/Lab will most likely run larger than a standard lab especially if one of the parents is chocolate. that said should be a very good looking dog
Mflo
