Can't offer much advice on the Reptibator or vermiculite since I've never done any breeding of my own, but in terms of which male to purchase, it should be whichever you want. If you think that a pastel pin looks cooler than a bumblebee, then get the pin. If you think bees are cooler, get the spider. Check as many breeders' available snakes as you can, and you're likely going to find a pin or spider that really stands out to you.