Sti owner planning to add 370z to garage

[kirv]

Hi all,
i'm looking to get a used low mileage 370z.

what are your thoughts on buying a base with sport package (need the limited slip diff, big brakes) and upgrading the suspension, maybe a cobb access port for some added power. ---or ---- buying a nismo? my feeling is that a base with sport package and a few $$ in mods can easily outperform a nismo for much less $$. does this sound about right?

also any thoughts on the other two cars i'm considering are welcome:
- cayman S
- corvette
if anyone has good experience to write a direct comparo, that would be helpful. right now the Z is in the lead due to best bang for the buck.

btw, i currently have an 05 STi Autocrossing '05 Platinum Silver Metallic STi - IWSTI.com: Subaru WRX STI Forums

i plan on keeping the STi as a winter car, and the Z, cayman s, or vette, as a fair weather / autocross car.

Thanks,
Mark