I would wait until your females are about a year old before you get a male. Males breed at a much smaller size than the ladies do. Also, taking care of your females while they grow will help give you time to figure out if you really do want to breed them, and will give you invaluable learning experience.

For a normal and a spider I would get one of the following males:

Super Pastel
Pastave
Pewter
Pastel Butter
Pastel Lesser
Lemonblast
Firefly
Kingpin

Some of those are much cheaper than others, but the longer you wait the better a male you can get.

Good luck either way.