We had a 15" ULine beverage fridge installed in our previous house and it worked well for 10 years, when we sold the house. The only reason we went with 15" was because the previous owners had an ice maker in that spot that we weren't interested in keeping. We are building and this time around we went with a 24", but chose SZ since I wanted it paneled.

I would recommend you go to a 24" if you have the space.

I have a 15-inch Perlick Signature 'Wine Reserve' that has been happily running for a number of years at 55F holding red wines. It has an overlay door. Near it under the same countertop is a Perlick 24-inch refrigerator holding ales, white wines, film, and other miscellaneous stuff. I retrofitted the refrigerator for the whites by ordering one shelf for a 24-inch Wine Reserve to replace an existing shelf.