I've got $20 on you ditching the battle belt (if you use one) after the first competition/heavy practice session. The thing I've learned from run n gunning is that you want as few individual pieces of equipment on you as possible. It looks great when you're standing there and you think of all the possibilities, but as soon as you're running, taking cover, firing, back up, running, change direction, taking cover.....you find out that it may not have been that great of an idea.
The Haley rig is ok, but you can't move anything around and you're stuck with what they give you. The cross harness sucks as well once you start running around. Use it and see but if you're not using a plate carrier, I'd look into either having a custom rack and H harness made or going with something like this:
http://www.optactical.com/mauwchrigqd1.html
Also the KYWI mags do weird things once they are wet and/or oiled up. The absolute best mag pouches I've ever used are the TYR Tactical Happy Mag without the inserts. It's bungee retention but also has enough retention (its adjustable) to hold the mags in without it. It will also fit any AR pattern, AK pattern and SR25 pattern magazine as well as it being only 2/3 the height of a regular M4 pouch so you can get a good amount of the mag in your hand to pull it instead of those shit TT shingles they gave me where you basically had to pull the mag put from the top with 2 fingers.