dual alternator kit

Oh and do i need to add in the other amp for the speakers?

A 200A alt should do ya just fine.  Assuming the vehicle has a good battery, you'll be fine.  Upgrade the big 3 to at least 4 AWG.Support the12volt.com

got ya. finally some closure...thanks man. Say i upgraded later to another soundstream r1 subwoofer and another infinity 1300 watt amp. would i need a gigantic alternator/dual alternators? would this change the battery situation? and would it probably be wise to get a small battery like this to help with not draining my battery? (i listen to music alot with the car off)

If you listen with the engine off then yes, a dual battery setup is probably a good idea.  I'd also suggest using a battery isolator or splitter so if you kill your music battery you will still be able to start the vehicle.  Understand of course that an alternator can only supply power when the engine is running...Support the12volt.com

yeah i understand that. what about if i upgraded. should i go ahead and get a large/ dual alt setup? could i upgrade later or would it be cheaper in the long run to go ahead and go big.

Oh and would it be possible maybe to run this setup: just assuming i could find an ultra-easy mounting bracket--mount a high output alternator with my stock alt. but could i leave all my stock stuff as is and run just my amps off this one h.o. alternator? just one main power wire from my h.o. alternator to my amps.