I'm just gonna comment on the neutering, I might make somecomments on the ethics question later (actually technicly it's meta ethics, but i makes a nice change to the meta meta ethics we've been discussing in other threads)

If we leave the ethics out of it the main reason not to neuter your dog is that you havn't decided for sure that you are not going to breed her yet, the main thing you pay for when buying a pedigree is the fact that more pedigrees can come out of it.

If we take it as fact that is would make her healthier then that is a strong argument for neutering.

But whet you may not have thought of is that if you don't neuter a ***** then it will go on heat, for a start imagine a dog with really bad P.M.T. and add to that that after this if you take it out for a walk other dogs will follow it home and try to do naughty things with it, this is really inconsiderate to other dog owners as once a dog has smelt a ***** the dog has to be kept on the lead untill it gets home otherwise it will just run off in whatever direction it thinks the ***** is. also it could be a real hassle for you aquiring new dogs and having to find out where they come from and bring them back.

Neutering won't hurt the dog, and it won't make it less happy, a Dog doesn't have a sense of feminism and I'm sure that most women would agree that if they could get rid of P.M.T. it would be a good thing (although they loose their womanhood and can't have children, but if you don't allow the dog to have puppies anyway it doesn't really matter)

So basicly If you don't want puppies then neuter it, and I'm sure you'll get puppies by accident anyway, and these will be mongrels no matter how good her pedigree is.