He's right. If you want proven potential (?) for loud setups... there you go. It "easy" to make those loud.
If you want a cool/special/unique setup... I voted 1 tumult. Go with an uber-huge enclosure to bring the efficiency up and pray the suspension holds up to the wattage, triple walled, resin the interior, support & reflective boards internally, 80ish sq in port (with some rifling to it), around 1kw-1.5kw (for budget reasons). Good luck.
It can be done, lots of folks at the finals in S, SS(no wall) hitting just into the 150's. Just spend alot of money on wood & resin & glue.
Regardless, any of these setups would be ****ed loud for street beatin