89&90's have the SOHC Engine which is 15 less HP than the DOHC Engine and the SOHC has a tendency to have a a timing chain problem and is expensive to fix. I would get a 91-93, 94s were just convertibles (i think). No real dif between the Coupe and Fastback. I think 89-91 coupes have the HUD, and its not that cool really. It really goes down to looks when your deciding on a HB or Coupe. I hope you read this and get over to the site NV mentioned before we VTD it. Later!