FYI - You always want to go with what your speakers RMS rating is.
Your 200.4 seems to be okay as far as powering the fronts and rears. Keep in mind that some/most amps power output are a bit higher than what they rate them at.
Lastly, if you have two single voice coil subs rated at 4 ohms, you will want to wire them like the diagram below to obtain a 2 ohm load which your amp can handle. you just want to make sure that your subs can each handle 300 Watts RMS so that you dont blow them up.
Do you know how to properly set your amps gains? Thats another thing to be careful of. You never want to clip the signal