Beginner

[SAMZ]

I have a toyota 2005 4 runner, ive sized out the back to be able to hold a minimum of 4 18s, but thats not why im hear. I am looking to buy a Ascedant Audio 18 or a 15 depends on prices, then i am looking into buying a soundstrem XXX. I think it would be a good idea to one add one more car battery, and another alternator, if u think this is pointless, please let me know. Also if there is a better setup with bigger bass please let me know. also i dont have any ideas where to look for prices so itd be good to look at some obviously.

Thanks

Sam

ps my budget is $2000 but im willing to save more for a better system.

System setup now:

4 10" pioneer subwoofers in the door (1 in each)

Pioneer deck

no idea what amp i have now