A current possibility, which hasn't been mentioned yet, is the new Honda Legend. The old one was a lardy beast but the new one is very good.
It has Honda's superb reliability, combined with a great 295bhp V6 engine, amazing AWD handling (it pulls almost the same g forces as the NSX sports car) and superb use of technology.
I love the way that they use noise cancellation through the Bose stereo to remove road and wind noise. Then there are the air conditioned seats and sensors to keep the car in the centre of the lane, the crash protection systems (where it tensions the seatbelt and brakes for you!) and a very clever idea which uses the onboard GPS to determine the position of the sun and increase the air con output on that part of the car
And that's apart from loads of other kit, such as DVD Voice Activated Nav, radar controlled cruise, rear view camera, Xenon curve lamps and very nice hand-stiched leather. It's absolutely fully loaded and has only 2 options on the list (18" alloys and parking sensors).
I reckon it looks fine, too, and it's very rare in the UK. Top speed is 155mph (electronically limited) and 0-60 is in 7.2 seconds.
The main downsides are that it is not exactly fuel-efficient (combined 24.6mpg), comes only with a 5-speed auto box and is currently still well over £20K secondhand (new price around £40K).