I've got a 15A and a hifonics bx1000d for $500 shipped, will outdo the WO's by a LONG shot. Also, if you're not aware, the A series has 29mm xmax and is built off the TC9 motor (modified) which is very similar to the rl-p made by sound splinter. Sounds absolutely great, and gets very loud.
EDIT: won't send box because it'd cost too much, but I will provide a box design for you to get the best out of this driver.