i have 2 eclipse SW8200 Subs- RMS power handling: 670W Max. power handling: 2000W A head unt thats 200 watts and a alpine sub thats 800 watts. have not yet picked my speakers out. i got a new alternator and battery i have a duralast battery that has 1000 crankin amps and the alternator is 105 Amp Premium . Will i have to upgrade again or will this be good enough? I have an 02 impala.