Happs, I’ve had two 27″ ovens in a couple of houses and also the micro-oven combination in another house, both in the wall at eye level.
If you ever cook a turkey over 18 lbs, the 27″ ovens are not big enough. I seldom ever used both at once, except during holidays.
When we had to replace the micro-oven combination, we had to make a shelf space below (like flu did) and get a drawer made to match the rest of the cabinets. This was because the *new* micro-oven combo was about a foot shorter than the old one that died. Luckily, there are several good cabinetmakers in my area.
I currently have ONE 30″ wall oven (convection) installed under a gas cooktop with a 30″ microhood installed above. I like this setup MUCH better. The oven is large and requires extra installation space in back, because of its fan, however. Not all kitchens will accommodate a 30″ convection wall oven.
If any part of your microhood fails, it only costs about $200 to $500 to replace it and you will be getting a new range hood and lights to go with it.
I much prefer the built-ins to a drop-in or standalone range.
I would recommend closing your double-oven hole with cabinets/drawers and installing a 30″ wall oven under your cooktop (this cannot be done if you have a downdraft cooktop). I find this to be the most practical setup. And underneath a center island cooktop will better accommodate the convection fan than a wall cabinet but take measurements, just to be sure.
Rarely have I seen kitchens with two 30″ wall ovens but they do exist.
