We are building a new house and are selecting our kitchen appliances. We have a 30 in double oven and will have a built in microwave. The built in microwave comes with a 27 inch or a 30 inch trim kit. Can anyone advise if we should go smaller (the 27 inch) or should the size match our ovens at 30 inches. The microwave and oven will not be on the same wall next to each other. They will be on opposing walls. Any input would be greatly appreciated. Thanks!