Cobb also released an Accessport for the Civic Si. Yea... theyre no KPro (they can only reflash the stock ECU) and the price reflects that. But they are tuning solutions.
I think this is bolt-ons, Cobb AP tuned.
As for the original topic, it's a tough choice.. The 350z is like a bit like a muscle car compared to the S2000. Probably more a better daily driver, more comfortable.. But the rawness of the S2000 really appeals to me. Plus I think the S2000 looks better. For a daily driver probably 350z, for a weekend/fun car probably an S2000.