I'm in the process of redoing my complete system and cant decide on what amp to run on a pair of Brahmas. How low can I wire up a pair of Brahmas to go? 1ohm in total? Right now I am considering the MTX 81000D, Orion XTR Pro 2400, US Amps USA 2000x or a pair of Ultimate Digitalis DD1-1300s. And feed back would be verty helpful.