Nothing wrong with the base model... I've gotten several comments on the 18s being nice , radio is not all that bad, vlsd isn't the greatest anyway on the sport and you can get the base for 27-28. Great value IMO. You can upgrade the brakes and a quaife diff will put the sport diff to shame for 1300. I'm extremely satisfied with my 09 base 370z.
Plus your tires are much much cheaper to replace!