From an EX TOW gunner,light Infantry,(M151 era),I wouldn't spend the coin on a DOAV.
Depending on your unit and mission,dismounted ops can range from a few feet from the vehicle,to parking the vehicles at BN motorpool and moving around by air,either way each team member will be humping some serious gear,,,30lbs. and up of missile system.Generally you won't be moving to contact,and won't need high speed harnesses,more like a mule harness,hehehe.
We did dismounted ops without TOWS(anti armor ambush and 'tank killer' teams),in which case you'll be loaded down with LAWS(or current),mines,dragons,etc,and working WITH the line Co.s or recon grunts providing 'security'.
If you really want to spend some money I would go with a GOOD pack then an assault pack,and
wait till you 'see' your job before buying webgear.
BulletcatchR