Question about a b system?

Well for the best sound you would want to get everything the same brand. Both JL Audio and Rockfosgate are great brands. They also make great 6x9 and tweets. Being hat you have two amps I would also get a distribution block to run power to each amp. As well as capacitors.When installing them the distribution block will let you run power to each capacitor. The capacitors will in turn allow for equal power to each amp, and keep your headlights from dimming when the b knocks. Also get the right gauge wires! Thick speaker wire from the amp to the speakers I suggest at least 14 guage. 4 to 0 guage for the power and ground. Also the ground must be equal or thicker than the power. you follow this and you will be beatting hard in no time.