I have blown one of my Rockford Fosgate Punch HX2 ten inch subs and think this may be a good time to upgrade, i used to have 2 10" rockfords and want to run my same 1001bd amp this time (1000x1 at 2 ohms). What is the loudest two 10's that i could run of this amp in a sealed box that is about .85 cubic feet? thanks for the help