The ten speakers are 6 in the front with a cross over and 4 in the back. Fronts are tweeter mid range and woofer rears are woofer and tweeter.
I have a standard rns without amp and upgrading speakers made a good difference to the sound.
In my opinion the rms isn't too important with the speakers you can fit in the doors with a cross over in the front they will be better than standard, be warned you will have some modding to do, also the woofer is riveted to the door and sits in a holder, my build thread has some pictures and i have talked through upgrade in a thread as well.