You are only 18 and yet specify that The Evo, Impreza Turbo, Escort Cosworth or GT4 must be easily insurable?!! Get back to us once you have a few insurance quotes for each of these.
Dont expect any of these to have "great fuel economy" either, In standard levels of boost alone you will probably get an average of between 15-25mpg depending on how its driven. At high boost levels as low as 8mpg
