I kinda regret not watching this earlier. It is SO GOOD!
The premise is simple, set in 2032 in Tokyo, Boomers, cyberdroids used for manual labor and military purposes intended to serve mankind, become deadly weapons in the hands of ruthless individuals. Behind the series of incidents is Genom, a megacorporation with immense power and global influence. Enter the Knight Sabers, an all-female mercenary team using highly advanced suits of powered armor to fight rogue Boomers for the safety of Mega Tokyo.
What really amazes me is how well the OVA series is done, going from animation, design and OST. My only complain is that it is unfortunately short: only 8 episodes and what is worse, is that we will probably never see another series get this much love in its production. This is truly a classic.