Deciding on a cooler

I recently purchased the Wine Enthusiast Classic from Costco. I am concerned with the high humidity level—frequently 85-97%.
With this concern, I have on order the Artevino III with plans to have the Classic returned.

I am looking for additional shelving for the Artevino. In the reviews for the new sliding shelves on the WE sites, some of the reviewers state that the shelves fit the Artevino. However, when I asked WE, I was told that they don’t fit. They apparently do have the non-sliding shelf like what comes in the unit–but a $100/shelf.

Any comments/suggestions regarding the difference in the units would be appreciated. (The Artevino ship date keeps being extended and is now 12/7 so could be cancelled.)

And comments/suggestion on shelving appreciated, as well. I am not thrilled with the stacking of bottles that is necessary with the shelving supplied with the Artevino.