How much wattage can your charging system maintain? (Because with a $600 sub/amp budget divided in half one half per item could potentially get you some gear requiring a bunch of current if you're willing to buy used)
What kind of sound are you after?
Do you mind giving a brand you're not entirely familiar with a try on the recommendation of enough people?
He's saying a max budget of $600 for both however the specific breakdown works out notwithstanding //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif