alternator

i have a 04 jeep wj with a 4.0 and i am running 2 amps on 200 watt for the speakers and a 500 watt for my sub i know my alt is bad i would like to add anothe 500 watt amp for my front speakers and just have the 200 watt amp for my rear speakers what kind of alt should i go with??



i know there is a company that makes a 220 amp alt or should i just go with a new oem alt