Including purchase price, and all mods, you'll get an Evo 6 to bigger power more reliably than you would a DE 350Z. Your point was about a turbocharged Zed to 750bhp feeling quicker from the get go than a 458, which it will, but so what? Anything can feel quick if you triple the power by adding a turbo to it!
A 458 doesn't feel stupidly quick, you're right, but that's what makes it such a great car.