What goes from 0-60 in less than 2.1 seconds (that's faster than the Dodge Tomahawk), has a top speed of roughly 238 mph, weights 1872 obs., has one of the best engines in history (flat 12, mounted mid, of course), has a twin turbo helping to reach an amazing 1100 bhp @ 7800 rpm and 820 lb/ft @ 6400 rpm, and is produced by one of the most respected german manufacturers in history?
Why the 1973 Porsche 917/30, of course!
As someone who has an intimate relationship with Porsche going back to my childhood, this would be my favorite by far. I plan on building a replica in the next 7 or 8 years.