I prefer males because the housing is easier in the long run. Most males won't outgrow a 32qt tub in their lifetimes. A big female would need more room.

A reptile show is a great way to purchase a Pastel because you can hold it and see the colors in person, but if you don't have a local show, buying online from a reputable breeder can be a great experience. If you need the name of a great breeder, drop me a PM.