Bill,
I believe you hit the nail on the head with your comparison.
My new combination is the S900 and PA800. That decision comes after assessing both, exactly like you have.
Can't wait to spend more time on the 800 and will take BOTH live.
zuki
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Yamaha 920 / Yamaha DGX-670 / Maui 5 Go (2) / Senn e935 / Sony C80 / Tascam DP24sd / ATEM Mini Pro switcher (studio)