Are Conformation shows the only good way to evaluate breeding stock?

[conradpem]

If I use the good judgement of several long time breeders of top dogs in my breed. For info on if I should breed the dog and what dog to breed it to. Is that enugh? Do I still need to show? I would like to get in to agility and obedeance, but my family is closed to the idea of conformation showing.
I should have said the over all evaluation of breeding stalk.