As John said, you don't want to be TO far back from the side position. It is hard to tell from the picture how far your considering, but slightly behind is what you want. I would say height is not a huge deal, but as close as possible the same distance back would be important.

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