Demon, Dart Sport or Duster
Including the 71 and 72 Demon in this poll will skew your results because of the basic difference in the 70-72 A-bodies versus the 73-76 A-bodies.
I currently own a 72 Demon (see pics) and I owned the 73 Dart 340 Sport that's in the magazine article below (sold it in 2001). I bought the 73 in 1978 from the second owner. It is all original numbers matching. I restored it in the early 90s just before the magazine article pictures were taken. Again, I sold it in 2001. I bought the 72 Demon (original 318 3-speed factory car) in 2004 and did it the way I wanted (4-speed, bucket seats and 408 stroker).
Both of these cars are great, but different. Early 70's A-bodies are lighter, most of the weight in the 73-76 is from the front "crash" bumpers, bumper braces and brackets. The 73-76 also has the addition of the nose piece in front of the hood.