
Hi,
From your post this is I assume a first time purchase of a puppy. Have you had a dog before? If you want a good quality puppy for the show ring price should be your last consideration. The puppy ideally should come from breeding stock which has been tested for relevant health problems under the British Veterinary Association (BVA) schemes. What breed are you hoping to buy? If you join us here we can help you a lot more.
It is an expensive hobby showing a dog with the average entry to a championship show costing £20 and often more, plus there is the cost of travelling to the shows, insurance, and anything else the show dog requires such as grooming equipment. Breeding from your pup once it is old enough can never repay the money you will spend to campaign your dog properly, unless you breed it so often that you become little more than a puppy farmer.
There is more to buying a puppy for show than meets the eye. Even experienced breeders "get it wrong", you only have to look at the hound group winner, who was sold as a pet, then rehomed with Jill Peak, for example, to know that even an experienced breeder can never tell when a puppy they are going to sell is the next big winner at Crufts or not, although they will have more idea than most other breeders.
As to registrations being late, this is not uncommon, but a reputable breeder will be happy to keep the puppy, or supply you with a contract of sale stating that the puppy will be registered and the papers will be sent along later. This is something you should speak to the breeder of your puppy about. It seems to me that having told the breeder of this "cheaper and closer" litter, you are now worried you may not have selected the right puppy for you, in which case I would advise you to pull out of buying this puppy, so that he/she gets a chance at a home that is right for it, and you get the puppy that is right for you. Buying a puppy is not as easy as it seems, before anybody is allowed to even think of having one of my puppies I always insist they go home and sleep on their decision before we go any further.