I need an amp to run my pair of 6.5 PG Rsd's and an 8 Inch midbass. Thinking about this 6 channel http://www.sonicelectronix.com/item_8315_JBL+GTO755.6II.html#. I could bridge the channels to get enough juice for the comps, but I might be underpowering the 8 inch off the 5th & 6th channel with only 163 watts(peak)? If there are any better choices, I'd appreciate.