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The first SRT Viper is sold, we spot an exotic XTS, and the 2013 SVT Raptor offers more off-road fun, this week's Autoweek in review

The first SRT Viper crossed the block at Barrett Jackson in Orange County this past week, for a cool $300,000. All the proceeds will go to the Austin Hatcher Foundation, a charity to help families and children affected by pediatric cancer. While the Cadillac XTS hasn't been a stranger on public roads around Michigan, this heavily camouflaged example is a bit of a mystery.

Concept Car of the Week: Cadillac Voyage (1988)

Once a symbol of America's most luxurious automobiles, Cadillac's image had begun to wane by the mid-1980s, and not even the Pininfarina-designed and built two-seater Allante was enough to excavate the brand's long gone leadership. In an effort to take Cadillac onto the global stage, engineers and the team of designers led by Chuck Jordan began working on the Voyage concept, a rolling laboratory with visionary styling and innovative technology. It was unveiled in 1988 at a technological exhibition in New York thus highlighting that rather than a stylist's dream come true, it was a very serious study towards aerodynamic, performance, handling, comfort and efficiency in an age when automated superhighways would allow fast, safe inter-State travel.

Lexus LS 600h L Review & Road Test (2011)

Lexus LS 600h Review For a car with a made-up name and a short history, Lexus has made a real impact. Now perceived by few as being just the luxury arm of Toyota, it is almost universally accepted as a luxury marque in its own right. Which is no mean achievement for a brand which seems to have been developed – at a reported cost of more than $1 billion to Toyota – to build and market a car so firmly based on the Mercedes S Class it made some of the current Chinese cloners look like amateurs.