LOL you dont know how to make a box but you recommend junk flea market power acoustik subs over pioneers? Wow.
If you dont have woodworking experience, or a table saw, or a way to get STRAIGHT cuts of wood (3/4 inch MDF), just go with a quality pre-made box.
Crutchfield has a decent writeup.
http://www.crutchfield.com/S-eyyKdOfZpI7/learn/learningcenter/car/subwoofers/box_building.html
And please, never tell some poor unsuspecting soul that power acoustik is better than anything, except maybe pyramid.