Competition rig
I have Bladetech Kydex holsters for all of my guns and a CR Speed universal that I can use with 3 out of four.
I shoot in IPSC , IDPA and Steel Challenge and sometimes use what ever is most convenient for me as I don't stay with one gun.
To me, the belt choice is a no brainer. I would go with the CR Speed two piece system that many or most competitor's use. They are very stiff and will accept whatever you want or need to hang on it. I have a Wilderness belt but it is not stiff enough and gives under the weight of all the gear.
CompTac is an excellent company with very good products and service. I use two different calibre models of their BeltFeed ammo pouch setups. These are just super in my opinion as you can get more mags in a limited area on your belt and still access them quickly. If you are interested in IPSC mag pouches are a key item. You will want to have five with four being the minimum. Definitely five if you use an 8 round capacity gun.
While expensive, the CR Speed and similar Ghost holsters are what most people use. Mine has the advantage of being adjustable for several of my guns. It is also easy on the gun's finish.
If this holster is beyond budget, I would start with the CR Speed Belt, the Beltfeed , plus one single pouch from Comptac and either their Kydex holster or Bladetech's.