One of the biggest challenges when it comes to combining technology and luxury vehicles is doing it in a way that is user-friendly, because it's about convenience, fun, and safety -- not frustration. These luxury cars can do everything from play your mp3s and DVDs to adjust automatically to treacherous driving conditions and off-road terrain. And perhaps best of all, they look good doing it.

• Audi TT Roadster 3.2 Quattro $44,500
• BMW 335i Sedan $39,675
• Cadillac CTS $32,500
• Ferrari 430 Scuderia
• Infinity G37 $32,000
• Lexus LS600h L $104,765
• Land Rover LR3 $49,300
• Mercedes-Benz C350 Sport $37,275
• Porsche 911 GT2
• Volvo XC70

As Detroit inches ever closer to its famous Dream Cruise, a celebration of antique, classic and modern American cars, the famous Woodward Ave. is bustling with '69 fastbacks, '57 Chevys and the like as they perform their trial runs for the big event. The annual classic car extravaganza

Forbes has just what we need -- a list of the top ten all-American sports cars. From the cars that have become synonymous with America, like the Corvette and the Mustang, to the less obvious but still powerful, such as the supercharged, 443-horsepower Cadillac XLR-V and 305 hp Panoz Esperante. Modern classics, such as the new Challenger, Camaro and Mustang, also pepper the list, as do American exotics, including the Saleen S7 and Dodge Viper SRT10, though the absence of the Ford GT was curious.

Click through to Forbes for the mouth-watering slideshow.

[Source: Forbes]

Jaguar die-hards scoffed at the X-type when it came out, seeing it as the automaker's attempt to woo drivers with a Cadillac bank account to the high-end brand. Like any automaker's foray into cheaper waters, the volume helped the bottom line for Jaguar, but slumming it may have done damage to the brand. Those die-hards may be in luck -- it seems that the automaker is considering axeing the X-type from its lineup.

Jaguar introduced the X-type in 2001 to attract the typical BMW 3-series owner, but stuffy styling, a Ford platform and quality issues held the model back from breaking the 100,000 unit/year barrier. Despite the drawbacks, the model accounts for as much as 60 percent of Jaguar's sales depending upon the market. As Jaguar plans its future, it may axe the X-type, despite the model's impact upon the automaker's financial success.

The move comes as Jaguar aims to move back upscale to a lower volume, higher profit situation, which it may be pursuing in order to be more attractive to would-be investors should Ford decide to put Jaguar on the bloc k. Instead of the X-type, Jaguar dealers will rely upon the XF, the S-type's replacement, for its sales. More comparable to a 5-series or Mercedes E-class sedan, the XF as the entry level vehicle should move Jaguar back up the ladder perception-wise. Other new models, such as the XK, will also be important as Jaguar seeks to come back from its slump.

[Source: The Age]

I am grateful to the aerospace industry for so many things: Airbus, NASA, SkyMall magazine ...

But I am especially grateful to the aerospace industry for its use of titanium, the space-age metal that used in airplane construction. Simultaneously unbreakable, indefatigable, corrosion-proof and ultralight, titanium is also totally dope.

Equally dope is Seven Cycles of Watertown, Massachusetts, which has been making bicycle frames from titanium since 1997.

With summer around the bend, I've got a jones for the IMX, Seven's flagship  titanium/carbon mountain bike. The frame alone is $3,395. Steep, yes. But think of it like the two-wheeled equivalent of a tailor-made suit.

That $3,395 includes custom sizing, yes, but it also includes dialed-in custom handling and ride characteristics (do you want Cadillac comfortable? Formula-1fast?). Decal choice is also part of the deal, as is making sure the frame is compatible with the exact components you choose.

In other words, the aerospace-quality bike frame you get is an honest-to-god one-of-a-kind.

Can you say that for a Boeing 747? I didn't think so.

It's time to check out the goods for the next Barrett-Jackson auction. The next auction, in Palm Beach, March 30 and April 1 will include two of Dr. Phil's exotic rides. The talk show host is unloading a  2002 Ferrari 360 Spider and a 2001 Gemballa Porsche Turbo. The Ferrari has titanium paint, chrome wheels and a blue convertible top with matching interior and the  black Porsche is a 911 Turbo modified by Gemballa with a 415-horsepower 6-cylinder engine and upgraded performance suspension. The cars should both bring in six figures. Also on sale is  a 2006 Cadillac CTS owned by musician Paul McCartney. The car was built for  McCartney with no animal products  and proceeds from the sale of McCartney's car will go to Adopt-A-Minefield.

With celebrity cars on eBay it's often a case of caveat emptor. This baby blue 1975 Cadillac Fleetwood is said to have once been owned by Frank Sinatra. The car has around 75,000 miles on it and comes with an eight track AM/FM stereo, five cigarette lighters, power door locks, cruise control, power seats, light blue tinted windows and blue leather upholstery. The ownership hasn't been positively verified but there is a plaque in the car that says it was built for Frank Sinatra by GMC and Sinatra's initials are on the trunk. It has a starting bid of $35,000 and last time we checked there were no bids.