Best car audio head unit set-up?

i have a 12 inch alpine type r running off a mrp500 and i am about to get 6x9 infinity references for the back and a 6x8 component for the front. Should i get an alpine cda105 abd a $100 equalizer or just an alpine ida x305. Or just a jvc s100. What would work best wih that setup. Btw i have no amp for the speakers