I would try setting your 80's to small, works much better for my 80's and 600 combination. Your 500 will do a much better job in the below 80hz categories than your 80's woofers.

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