If you plan on doing mods,don't get the nismo,unless you just want the name. You can get the same performance and aftermarket looks with a sport touring and put the money you save(sport touring vs nismo pricetag)and put it towards upgrades.
If I was to buy a 370 again and wanted to stay stock,I would go with a nismo. And if I could afford it,I would get the 2015. I actually like the look!