While luxury can be an adjective, the more usual adjectival form is luxurious. The superlative of luxurious is most luxurious.
My house is the most luxurious place of all.
i think the bugatti veyron 16.4 version is the most luxurious car in the world...
The comparative form of "luxury" is "more luxurious."
Grandstand facade of Santa Anita Park is one of the most luxurious grandstands in the country as the founder, before building it, wanted to make sure that he built the "most luxurious racecourse ever".
Dreamflyer
My handbag
The surface of the earth is covered by water for the most part. However, there are countries on many of the earth's landmasses. The percentage of countries that have mountains in them is approximately 30 percent.
Louis Vuitton makes the most luxurious accessories bags. They are known for their design and high price. However, many argue that Coach makes the most luxurious accessories bags.
The most Luxurious City
There are not 10 continents on Earth.
It is the most luxurious apartments in a hotel.