Michael, first figure out if this is a whim/impulse thing or a lasting interest; many people buy these cars new or used and resell them less than a year later.
Then decide what are important features - the nostalgia image, performance, or both? If performance is desired, how much? Do you want taut handling? Do you want a daily driver with good weather protection and visibility, and comfortable seats (convertible "D")? Or will this car be a fair-weather, weekend cruiser?
Performance means 4 wheel disk brakes, too (they don't need to be power brakes), and safe, precise handling means an IRS rear suspension car with front and rear anti-roll bars; maybe even rack and pinion steering. A performance engine may also (probably will) require a beefed-up VW transaxle or Porsche 901 transaxle. It will almost certainly mean lower gas milage and premium gasoline.
Then decide how much you can afford to spend and what other options you want (larger gas tank, etc.) and shop the three big builders, VS, JPS, and IM.