Aloha perles!
Gauge of wire and type of jig really depends on what you want to make. After studying the www.wigjig.com site, I picked a WigJig Dephi to make findings, like hooks and earwires. I probably would have bought the Centaur, if I had more money. Instead, I also got the Super Pegs which come in handy for large rings, "S" hooks and hoop earrings. I purchased my jig and accessories from the SoftFlex booth at a bead show.
Couple tips: Use a file to round off the corners and edges of the jig, and a fine tip permanent felt pen to mark inches or centimeters on the side of the jig. An easy way to make your pieces consistent.
Hope this helps! ~alohabc 