I need a microwave oven to fit an 18 inch deep cabinet. The developer has installed a low end GE microwave but it is too small for the opening. Lots of room on top and sides (opening is 23" wide by 14" high) but cabinet is only 18" deep. Looking for a unit that would fit, probably with a trim kit to make it look very finished. Many units are available seem to be about 19 inches deep. Will those work with a trim kit or should I be looking for a unit that is less than 18 inches? I keep hearing good things about Panasonic...my other appliances are all SS GE Profile. Except for the GE space saver, their units are too big. I want something with nice features but doesn't need to be very large. Comments, pics or advice is appreciated.