If the dog is a house dog it is likely to moult throughout the year unfortunately.
Looking at the Kennel Club site to find an acredited breeder as well as trying to get personal recommendations.
As has been mentioned before Labs are incredibly common/popular dogs so are far more likely to attract unscrupulous puppy farmer type breeders as there is a much bigger market for them than the pointers I own (fabulous dogs btw )Make sure you do as much research about the breeder before you go and see the pups as there's no way you'd be saying no when you go and see then!
Find out, how many litters the breeder breeds per year and why they breed, for showing, working etc. Also find out about what health screening they do on their dogs/bitches, labs should certainly be hip scored before being bred from and I'm sure there are other health tests too. The health tests may help to weed out the less reputable breeders. As has been said before show bred gundogs tend to be far calmer than working types, some spaniel's can seem like completely different breeds and a "show type" may be easier to handle/have around the house particularly if you are a new dog owner.
Take notice of the exercise advise given about labs, you do have to quite careful with them as pups and makes sure they don't gallop too much but once they are fully grown they really do need 2 hours or so everyday as they are bred to work. As they are a retrieving breed they will love playing games with you, fetch etc etc.
Hope that all helps and good luck, however, if you change your mind about the breed of dog I can't recommend pointers enough a very underrated breed as a pet but very happy sitting on your lap all day given half the chance Also, of all the dogs I've had none have ever got people's attention like the pointers.
ps, I'm knackered now after all that typing!