 If you liked
Metal Fighter Miku
|
 ...then you might like
Bubblegum Crisis
|
Bubblegum Crisis inspired many series and Metal Fighter Miku is most likely one of them.
Four main female characters - check
Metal/Mecha suits - check
Fighting sequences - check
Cool soundtrack - check
Be advised that Metal Fighter Miku is not as great as Bubblegum Crisis, but nonetheless it's still a really good series.