[@Vocab]
So you have working armored battlesuit that are controlled using neural helmets?

We have trouble making a robot that moves moderately fast on four legs, that's completely dedicated to carrying stuff. I dunno how these comparatively superexpensive things would be an alternative. 

Modern combat doesn't need much heavy armor- Main Battle Tanks (MBT) and Infantry Fighting Vehicles (IFV) take care of that, such as the Abrams MBT or Bradley IFV. A squad of Marines also usually carries some kind of AT weapon, such as a SMAW, in case they need to blow something up. A really expensive armor suit would fall quick to a Marine squad, and the Marines would be much easier to train and arm.