2 Walk-in Closets or 1 Bonus Room?

[Rick Bassett]

We are rehabbing a house and have the option of adding a walk-in closet to two of the bedrooms or adding a decent sized Bonus Room (office) to the floor plan.

I say Bonus room as the home it is size of a bedroom but due to septic sizing it can't technically be a bedroom.

So if you had to choose for resale value, which would you pick?