I prefer the 92-93 GS-R. It's an OBD-1 car with a pretty rare B17A1 engine. The transaxle has excellent gearing, the interior is great, and since it's a second generation unit, it doesn't have the ass-ugly bug eye headlights.
The B17A1 is prone to spin rod bearings when they get older, however (over 150k.) You can help prevent this with the addition of a crank girdle, they are not very expensive.
The 92-93 GS-R is a rare car, so it will also have collector's value in the future... in a way it already does. Fortunately, parts are still plentiful, so no need to worry about that. The only unusual part it uses is it's crank and rods (availible through Acura, aftermarket rods are also availible)... everything else is interchangible with other models.:thumbup: