How much space do you have? Id go with the one ported 12, but thats assuming you have 2-2.5 cubic feet.
With 800 watts, you have quite a few options...Type R, Incriminator audio lethal injection (my fav), RE SE, FI SSD, etcetc. Youd like any of those.
Just make sure you put it in a good box...those will all like something aroudn 2.5cubes at 30-35hz.