Type r 12 in a q logic 4th order with a Rockford amp. This was in 2006. My friend that was a senior worked at best buy and bought all the gear from there. When he graduated he sold the whole setup to me because I was so in love with it.
I used copper 2/0 welding lugs on my big three and I used a can of that liquid electrical tape on them after I had them all in place. It seals them up real well and can easily peel off if/when you need to disconnect the wires.