My #@%$ Cat Destroyed My ARC REF 5SE. Soliciting Suggestions.

(Public service announcement-keep your pets away from your audio equipment)

I love my cat. But not as much as I once did :-)
The short story is cat pee corroded the main board to my ARC REF 5SE. 

Homeowners insurance doesn't cover repair or replacement because owning a pet means you assume liability/responsibility. Ironically, or strangely enough, If my neighbor's cat or dog did this, I could collect.

My options-
Repair it. Fixing it will cost 7K. The main board alone is 6K.
Buy a pre-owned replacement at close to similar price. And if I go pre-owned, what's the market on a REF 5SE with a destroyed main board.
Go in a different direction.

What would you do?

TIA,
David