c5 = not good to drive around all year, not practical as only car, insurance will rape you, depreciation will make you cry
g35 = a little better to drive around all year, more practical than c5, insurance isn’t so bad, depreciation is pretty good too.
sti/evo = ok to drive all year, albeit a little rough for comfy daily driving, the most practical vehicles, insurance will probably not like you much either, depreciation isn’t bad, you will be tempted to mod like crazy.
If I had one car, it would be an evo
If I were you, I’d get an STi or an Evo, because you seem to only want one car.