Do you have the need for speed by don't like the price tag of fuel for a high-performance vehicle? Jim Ellis Audi highly suggests considering the 2013 Audi RS 5. With a 4.2-liter V8 engine under the hood, it produces 450 horsepower while still achieving 22 miles per gallon combined (city/highway). So far, it's found many enthusiasts in the Atlanta area, and we don't see its popularity faltering any time…