re: Any woodworkers out there that can tell me which pocket hole jig I should buy

you need the type of screw head they have. A tapered head doesn't work as it splits the wood under any force. And you'll want the square drive. There are other brands of that type of screw, but you won't really save money The long bit that comes in the kit is required due to the angle you drive the screw. I have that exact kit and use it when I need pocket holes.

However, don't over use pocket holes. They are not a strong wood joint. They are good for simple cabinet boxes and face frames. I've also used them for drawer boxes with false fronts. But as I got more into woodworking, I rarely use that jig.