As of now i have pioneer 4-way 6 x 8 260 w speakers in the front doors running of my pioneer head unit. I plan on adding two more in the rear doors and also adding a sub box under the seat with a Rockford Fosgate P3SD210 10 inch sub.

My question is what amp would be recommended and do i need to run my door speakers off the amp too? I'm new to all this so I'm not really sure what i need and what the benefit of running the door speakers off the amp would be.