It all comes down to personal preference and taste. It looks nice and like a quality product, but I wouldn’t spend any extra money on it. The Odroid case may be plastic, but it’s cheap and functional. 40C is not hard to achieve on an N2 without active cooling with the original case, because the heatsink is completely exposed rather than being enclosed inside of a box requiring active cooling.
As another alternative, I opted to pay the extra $10 for the vesa mount. The N2+ is strapped to the back of my TV so I never have to worry about how comely the case is.