I just got a 10k NX card and I was wondering which pet should I choose... If I get the panda, I can't get anymore pets. If I get an average pet, I can get 2 of them and if I get a weak pet (like those kitties

) I can get 3 of them... So what's better? Quantity over quality or vice-versa? Also which are the best pet in each categories? (even if I think they all have their own up and down)
PS: When I'm talking about average and weak, I'm talking about the price.