Looking at the above website, I'm trying to determine which model would be best for the 80's? What does going with the higher memory options resolve, I see the Stratos Extreme has 180,000. I don't see any specs for 4 ohm speakers either.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85