Blue Alpha for pistol/duty belts, Esstac for magazine pouches, Flatline Fiber Co for belt IFAK and dump pouch. For plate carriers, the Shaw Concepts ARC is good for heavier loads, and the Javlin Concepts A-JAC is good for lighter loads. For chest rigs, there are really a ton of options depending on what you want to carry. Same deal with packs.
The D3CRX would be a decent choice for 2-gun matches as it can hold 4 rifle magazines and 4 pistol magazines, but it creeps up in price once you add a harness and inserts. If you bought a Spiritus Micro Fight MK4, a harness & back strap, and inserts for 3 AR and 4 pistol magazines, you'd come in under what the D3CRX costs ($216 vs $270).
Another interesting option would be the Unobtanium Gear SLEDS placard that holds 3 AR magazines, plus their 5x pistol mag pouch that mounts to the front of their SLEDS placard, plus their H-harness, all which totals $178.
Yeah, there are a lot of options out there.