Made with a carbon-fiber rim and a forged magnesium center, you can't get any closer to F1 wheel technology for your daily driver. Good looks don't come cheap, though.

MSRP: $2,500 (that's per wheel, folks)
www.rennworx.com

So here's the deal, for 10,000 dollars, you can have wheels that start out around 14 lbs per wheel.  They market them to high end Euro cars.  My guess is that they are the only ones who can afford these things (and the only ones willing to own something just for the principal of having it).  Is it worth it?  You do the math.

Here's what I run:
OZ Superleggera - 17 in - 15.2 lbs per wheel
Price: $250 per wheel

Some other options:
Gram Lights, 5Zigen fn01r, Volk TE37s - 17 in - 16-18 lbs
Price: $260 - $500 per wheel

Does 2-4 pounds per wheel justify $2,000 more per wheel, $8,000 - $9,000 more total?

Oh, and let's not forget tires...