I recommend the 47 or 17. Either will take you as far as you ever want to go in the sport.
I like the DAA XiP pouches because you can adjust them around a wider axis. I like to angle mine out away from the belt about 30 degrees to help match the angle my hand grabs them.
I prefer bladetech over comptac, but it's been years since I had a comptac.
All my Glocks have for triggers are minus connectors, pure tungsten guide rods, and brass grip plugs that I helped design from CH precision. For a trigger I'm using a minus connector, a 5# striker spring, lighter plunger spring, and extra power return spring. The performance trigger is good though and would work fine.
On a budget, id go with a ch precision comp optic.