I am assuming the amps are 4 channel amps.
Wire one of the amps to power all the 6.5s on seperate channels.
Wire the other amp to power the 6x9s to 2 channels and bridge the other 2 channels for the subs. Then build baxes for the woofers. The woofers definitely need to be in sealed boxes.
This will give you the best sound without having to replace any of the equipment you currently have.