D16a6 vs. Z6 head

I have a D16a6 and I am thinking about putting a z6 head that I have sitting around on it. I plan to boost the car soon so would the a6 or z6 vtec head work best and which would be best for all motor as well?

N/A setups are completly opposite from F/I setups... you need to decide which direction you want to go