1. Dacor - MMD24 / MMD30
Models, both available at a solid stainless (no window) doorway or black glass finish. These finishes are exclusive to Dacor, and all are priced at about $1,399-$1,549.
2. Gaggeneau - MW420620
These units are virtually identical, the Thermador is a bit cleaner looking with a mostly black door. The Bosch name is a bit more prominent in their unit. The Gaggenau end will match their more modern looking line. These are $1,259, $1,499, and $1,699 respectively. The two Thermador and Gaggenau carry two-year guarantees.
You can mount these models flush into the cabinet, therefore it is more attractive.
A great match for the Much-improved Jenn-Air lineup, this really is a mid-priced version at $1,399. This is the least expensive of these models with 2-year warranties.
3. Wolf MD24TES / MD30TES / MD30PES
Wolf offers three various versions, one 24 and 2 30-inch versions. These fit their new wall oven offerings. They take a 2-year guarantee.
Sharp actually has two unique styles they've kept for themselves. They offer a handle variant in a 24-inch and concealed display in 24-inch or 30-inch. New for 2017 is the black stainless edition.
As mentioned previously, there is not 1 drawer unit that will be "much better" than the others. There's a cost difference of close to $1,000 in the least expensive Sharp to the priciest Wolf.
The drawer is a cleaner, however more expensive look compared to a normal microwave. Without any differences, I would look at costs and the ability to mount the unit flush into the cabinet.
Jenn-Air, Bosch, and Wolf have package rebates worth considering when buying other products. Otherwise, think about the Sharp.