hi.. i have a 2000 honda civic hatchback.. anyways, here is my current setup

eclipse 5442 headunit
alpine v12 amp
12" mtx sub
kenwood 6.5" (front)
sony 3" (rear)

i recently got an eclipse 5303r headunit which requires an amp to power it.. any suggestions on the amp?

also, i would like some 6x9's to replace the small 3" sony speakers in the rear to gain some mids. do any 6x9's fit in ?

thanks in advance.