To me, if you asked me what luxury car makers there are around these days, I would say the following:
BMW
Mercedes-Benz
Audi
Porsche
Land Rover
Aston Martin
And maybe Jaguar, Rover, Lexus and Volkswagen
Porsche and Aston Martin manage to balance out Sport and Luxury evenly.
BMW sometimes overpower the Sport or the Luxury, and Mercedes normally seem to care about Luxury only, but they evenly balance out Sport and Luxury secretly.
Audi is like BMW. They change their minds.
Land Rover is basically luxury and the only things that come from England and bear the world Land Rover are the supercharged models.
Jaguar, Rover and Volkswagen don't really scream sport to me at all.
Lexus is a try-hard brand from Toyota, I'm sorry to say.
They are luxury vehicles, but they are Toyota's.
I'd drive any Lexus vehicle, however it doesn't really feel like you are driving a Lexus. It feels like you are driving a Toyota with a supercharger.
I must say that I've always loved BMW's, and I still do.
But if you want to get a luxury car, I still think Mercedes-Benz is what you really call good cars. No offence, but the GLK is a complete stuff up and looks like a car that has been sent to the crusher to make it look more boxier.
Recent vehicles with new designs coming from these automakers have been the following:
Audi A4
Audi A5
Audi Q7
Lexus LS
Lexus LX
Mercedes-Benz C-Class
(I would not say Mercedes-Benz GLK-Class because it isn't showing any new design apart from stuff you find in car dumps, give it a few years time and it will be revamped and look like the ML-Class, hopefully)
Mercedes-Benz S-Class
BMW X3 & 3-Series did, but their style has sunk in already.
BMW X5
BMW X6
BMW 3-Series Coupe & Convertible
BMW 3-Series M Coupe, Saloon & Convertible
Land Rover Freelander
Porsche did with the restyling of their coupes & convertibles, but that like the BMW X3 & 3, has sunk in
New Porsche Cayenne (I don't really now why it deserves to be called an all-new car, its practically the same as the previous one)
Volkswagens new designs have sunk in
I want everybody who wants to - to maybe choose some or think of their own new luxury vehicles that have changed the overall design of their brand and sort them into studs or duds.