Comes down to this: if you want a car that has some improvements and will be slightly better for resale than a base + sport = get the nismo... If you plan on tracking the car - and plan on doing a lot of mods (read: intake / wheels / exhaust / headers / anything)... get the Base... unless you want the exclusiveness of the nismo in which case get that and still do mods on top of it...
If it were me... I would get a base + sport .. get new seats ... get new wheels... get sways... and intake / exhaust / headers / tune and call it a day... you will probably have to get an oil and diff cooler either way
