I have decided to buy the Fi Q10.  It was a tough decision between that and the IDMax 10, I actually decided on the Fi because my custom box is very small, I hope it will give me great performance in this small box (also it fits, the mounting depth on the IDMax is a little too long).  Anyway, my question is: should I get the BP power option if I am NOT going to install the sub inverted.  Someone on the CAF forum said I would have to install it inverted to get the benefit of the BP option.  I am running an Orion 1200D amp, I will get the dual 2 and run the amp at 1 ohm, would be about 1200 watts max (I may not set the gains that high).  Should I get the BP power option or not?