If you are running 12"s...even ported, you will have tight bass. I noticed a difference in dropping from 15"s sealed to 12"s ported, and the 8" midbasses will help you even more.
If you go ported, try a compromise of ~35hz tune, that will give you decent depth and will still work with rock music too. I wanted a 35 hz tune, but 'settled' for 38 hz due to airspace limitations. Mine really shines on '80s and rock music, and lacks the ultra lows, seems to be loudest right at 40hz.